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Finding the Fourth Proportional to 38,130.59, 52,620.59 and 21,135.20

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Solution

The fourth proportional to 38,130.59, 52,620.59 and 21,135.20 is: 29,166.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,130.59 : 52,620.59 = 21,135.20 : x
  2. Step 2: Convert to fraction form
    38,130.59/52,620.59 = 21,135.20/x
  3. Step 3: Cross multiply
    38,130.59x = 52,620.59 × 21,135.20
  4. Step 4: Simplify right side
    38,130.59x = 1,112,146,324.99
  5. Step 5: Solve for x
    x = 1,112,146,324.99/38,130.59
  6. Step 6: Final answer
    x = 29,166.78

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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.