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Finding the Fourth Proportional to 38,966.40, 53,773.63 and 21,061.40

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Solution

The fourth proportional to 38,966.40, 53,773.63 and 21,061.40 is: 29,064.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,966.40 : 53,773.63 = 21,061.40 : x
  2. Step 2: Convert to fraction form
    38,966.40/53,773.63 = 21,061.40/x
  3. Step 3: Cross multiply
    38,966.40x = 53,773.63 × 21,061.40
  4. Step 4: Simplify right side
    38,966.40x = 1,132,547,960.01
  5. Step 5: Solve for x
    x = 1,132,547,960.01/38,966.40
  6. Step 6: Final answer
    x = 29,064.73

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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.