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Finding the Fourth Proportional to 39,393.92, 54,363.96 and 21,489.01

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Solution

The fourth proportional to 39,393.92, 54,363.96 and 21,489.01 is: 29,655.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,393.92 : 54,363.96 = 21,489.01 : x
  2. Step 2: Convert to fraction form
    39,393.92/54,363.96 = 21,489.01/x
  3. Step 3: Cross multiply
    39,393.92x = 54,363.96 × 21,489.01
  4. Step 4: Simplify right side
    39,393.92x = 1,168,227,544.17
  5. Step 5: Solve for x
    x = 1,168,227,544.17/39,393.92
  6. Step 6: Final answer
    x = 29,655.02

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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.