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Finding the Fourth Proportional to 15,130.85, 20,872.05 and 9,079.53

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Solution

The fourth proportional to 15,130.85, 20,872.05 and 9,079.53 is: 12,524.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.85 : 20,872.05 = 9,079.53 : x
  2. Step 2: Convert to fraction form
    15,130.85/20,872.05 = 9,079.53/x
  3. Step 3: Cross multiply
    15,130.85x = 20,872.05 × 9,079.53
  4. Step 4: Simplify right side
    15,130.85x = 189,508,291.82
  5. Step 5: Solve for x
    x = 189,508,291.82/15,130.85
  6. Step 6: Final answer
    x = 12,524.63

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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.