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Finding the Fourth Proportional to 10,485.71, 15,720.92 and 4,935.97

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Solution

The fourth proportional to 10,485.71, 15,720.92 and 4,935.97 is: 7,400.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,485.71 : 15,720.92 = 4,935.97 : x
  2. Step 2: Convert to fraction form
    10,485.71/15,720.92 = 4,935.97/x
  3. Step 3: Cross multiply
    10,485.71x = 15,720.92 × 4,935.97
  4. Step 4: Simplify right side
    10,485.71x = 77,597,989.49
  5. Step 5: Solve for x
    x = 77,597,989.49/10,485.71
  6. Step 6: Final answer
    x = 7,400.36

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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.