Home / 12,982.40-19,474.56-4,218.72

Finding the Fourth Proportional to 12,982.40, 19,474.56 and 4,218.72

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Solution

The fourth proportional to 12,982.40, 19,474.56 and 4,218.72 is: 6,328.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982.40 : 19,474.56 = 4,218.72 : x
  2. Step 2: Convert to fraction form
    12,982.40/19,474.56 = 4,218.72/x
  3. Step 3: Cross multiply
    12,982.40x = 19,474.56 × 4,218.72
  4. Step 4: Simplify right side
    12,982.40x = 82,157,715.76
  5. Step 5: Solve for x
    x = 82,157,715.76/12,982.40
  6. Step 6: Final answer
    x = 6,328.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.