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Finding the Fourth Proportional to 15,987.90, 22,063.47 and 8,818.11

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Solution

The fourth proportional to 15,987.90, 22,063.47 and 8,818.11 is: 12,169.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,987.90 : 22,063.47 = 8,818.11 : x
  2. Step 2: Convert to fraction form
    15,987.90/22,063.47 = 8,818.11/x
  3. Step 3: Cross multiply
    15,987.90x = 22,063.47 × 8,818.11
  4. Step 4: Simplify right side
    15,987.90x = 194,558,105.44
  5. Step 5: Solve for x
    x = 194,558,105.44/15,987.90
  6. Step 6: Final answer
    x = 12,169.08

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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.