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Finding the Fourth Proportional to 38,572.40, 53,229.08 and 20,908.40

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Solution

The fourth proportional to 38,572.40, 53,229.08 and 20,908.40 is: 28,853.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,572.40 : 53,229.08 = 20,908.40 : x
  2. Step 2: Convert to fraction form
    38,572.40/53,229.08 = 20,908.40/x
  3. Step 3: Cross multiply
    38,572.40x = 53,229.08 × 20,908.40
  4. Step 4: Simplify right side
    38,572.40x = 1,112,934,896.27
  5. Step 5: Solve for x
    x = 1,112,934,896.27/38,572.40
  6. Step 6: Final answer
    x = 28,853.14

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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.