Home / 38,123.60-52,609.05-21,128.56

Finding the Fourth Proportional to 38,123.60, 52,609.05 and 21,128.56

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Solution

The fourth proportional to 38,123.60, 52,609.05 and 21,128.56 is: 29,156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,123.60 : 52,609.05 = 21,128.56 : x
  2. Step 2: Convert to fraction form
    38,123.60/52,609.05 = 21,128.56/x
  3. Step 3: Cross multiply
    38,123.60x = 52,609.05 × 21,128.56
  4. Step 4: Simplify right side
    38,123.60x = 1,111,553,337.95
  5. Step 5: Solve for x
    x = 1,111,553,337.95/38,123.60
  6. Step 6: Final answer
    x = 29,156.57

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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.