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Finding the Fourth Proportional to 38,987.80, 58,452.90 and 15,602.20

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Solution

The fourth proportional to 38,987.80, 58,452.90 and 15,602.20 is: 23,391.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.80 : 58,452.90 = 15,602.20 : x
  2. Step 2: Convert to fraction form
    38,987.80/58,452.90 = 15,602.20/x
  3. Step 3: Cross multiply
    38,987.80x = 58,452.90 × 15,602.20
  4. Step 4: Simplify right side
    38,987.80x = 911,993,836.38
  5. Step 5: Solve for x
    x = 911,993,836.38/38,987.80
  6. Step 6: Final answer
    x = 23,391.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.