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Finding the Fourth Proportional to 15,029.62, 20,742.42 and 8,656.42

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Solution

The fourth proportional to 15,029.62, 20,742.42 and 8,656.42 is: 11,946.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,029.62 : 20,742.42 = 8,656.42 : x
  2. Step 2: Convert to fraction form
    15,029.62/20,742.42 = 8,656.42/x
  3. Step 3: Cross multiply
    15,029.62x = 20,742.42 × 8,656.42
  4. Step 4: Simplify right side
    15,029.62x = 179,555,099.34
  5. Step 5: Solve for x
    x = 179,555,099.34/15,029.62
  6. Step 6: Final answer
    x = 11,946.75

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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.