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Finding the Fourth Proportional to 15,987.50, 22,063.52 and 8,913.92

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Solution

The fourth proportional to 15,987.50, 22,063.52 and 8,913.92 is: 12,301.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,987.50 : 22,063.52 = 8,913.92 : x
  2. Step 2: Convert to fraction form
    15,987.50/22,063.52 = 8,913.92/x
  3. Step 3: Cross multiply
    15,987.50x = 22,063.52 × 8,913.92
  4. Step 4: Simplify right side
    15,987.50x = 196,672,452.20
  5. Step 5: Solve for x
    x = 196,672,452.20/15,987.50
  6. Step 6: Final answer
    x = 12,301.64

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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.