Home / 12,474.79-17,218.70-7,437.40

Finding the Fourth Proportional to 12,474.79, 17,218.70 and 7,437.40

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Solution

The fourth proportional to 12,474.79, 17,218.70 and 7,437.40 is: 10,265.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,474.79 : 17,218.70 = 7,437.40 : x
  2. Step 2: Convert to fraction form
    12,474.79/17,218.70 = 7,437.40/x
  3. Step 3: Cross multiply
    12,474.79x = 17,218.70 × 7,437.40
  4. Step 4: Simplify right side
    12,474.79x = 128,062,359.38
  5. Step 5: Solve for x
    x = 128,062,359.38/12,474.79
  6. Step 6: Final answer
    x = 10,265.69

Related Problems

Find fourth proportional to 6,237.40, 8,609.35 and 3,718.70
Half scale
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Double scale
Find fourth proportional to 12,475.79, 17,220.08 and 7,438.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.