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Finding the Fourth Proportional to 39,840.13, 54,978.78 and 23,718.70

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Solution

The fourth proportional to 39,840.13, 54,978.78 and 23,718.70 is: 32,731.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,840.13 : 54,978.78 = 23,718.70 : x
  2. Step 2: Convert to fraction form
    39,840.13/54,978.78 = 23,718.70/x
  3. Step 3: Cross multiply
    39,840.13x = 54,978.78 × 23,718.70
  4. Step 4: Simplify right side
    39,840.13x = 1,304,025,189.19
  5. Step 5: Solve for x
    x = 1,304,025,189.19/39,840.13
  6. Step 6: Final answer
    x = 32,731.45

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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.