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Finding the Fourth Proportional to 6,865.80, 9,474.98 and 4,211.63

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Solution

The fourth proportional to 6,865.80, 9,474.98 and 4,211.63 is: 5,812.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,865.80 : 9,474.98 = 4,211.63 : x
  2. Step 2: Convert to fraction form
    6,865.80/9,474.98 = 4,211.63/x
  3. Step 3: Cross multiply
    6,865.80x = 9,474.98 × 4,211.63
  4. Step 4: Simplify right side
    6,865.80x = 39,905,110.02
  5. Step 5: Solve for x
    x = 39,905,110.02/6,865.80
  6. Step 6: Final answer
    x = 5,812.16

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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.