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Finding the Fourth Proportional to 20,374.56, 30,565.08 and 9,987.12

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Solution

The fourth proportional to 20,374.56, 30,565.08 and 9,987.12 is: 14,982.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.56 : 30,565.08 = 9,987.12 : x
  2. Step 2: Convert to fraction form
    20,374.56/30,565.08 = 9,987.12/x
  3. Step 3: Cross multiply
    20,374.56x = 30,565.08 × 9,987.12
  4. Step 4: Simplify right side
    20,374.56x = 305,257,121.77
  5. Step 5: Solve for x
    x = 305,257,121.77/20,374.56
  6. Step 6: Final answer
    x = 14,982.27

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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.