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Finding the Fourth Proportional to 38,155.50, 52,659.45 and 21,388.50

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Solution

The fourth proportional to 38,155.50, 52,659.45 and 21,388.50 is: 29,518.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,155.50 : 52,659.45 = 21,388.50 : x
  2. Step 2: Convert to fraction form
    38,155.50/52,659.45 = 21,388.50/x
  3. Step 3: Cross multiply
    38,155.50x = 52,659.45 × 21,388.50
  4. Step 4: Simplify right side
    38,155.50x = 1,126,306,646.33
  5. Step 5: Solve for x
    x = 1,126,306,646.33/38,155.50
  6. Step 6: Final answer
    x = 29,518.85

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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.