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Finding the Fourth Proportional to 38,752.52, 53,478.99 and 21,755.75

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Solution

The fourth proportional to 38,752.52, 53,478.99 and 21,755.75 is: 30,023.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,752.52 : 53,478.99 = 21,755.75 : x
  2. Step 2: Convert to fraction form
    38,752.52/53,478.99 = 21,755.75/x
  3. Step 3: Cross multiply
    38,752.52x = 53,478.99 × 21,755.75
  4. Step 4: Simplify right side
    38,752.52x = 1,163,475,269.30
  5. Step 5: Solve for x
    x = 1,163,475,269.30/38,752.52
  6. Step 6: Final answer
    x = 30,023.22

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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.