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Finding the Fourth Proportional to 15,012.78, 20,714.70 and 9,044.78

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Solution

The fourth proportional to 15,012.78, 20,714.70 and 9,044.78 is: 12,480.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.78 : 20,714.70 = 9,044.78 : x
  2. Step 2: Convert to fraction form
    15,012.78/20,714.70 = 9,044.78/x
  3. Step 3: Cross multiply
    15,012.78x = 20,714.70 × 9,044.78
  4. Step 4: Simplify right side
    15,012.78x = 187,359,874.82
  5. Step 5: Solve for x
    x = 187,359,874.82/15,012.78
  6. Step 6: Final answer
    x = 12,480.02

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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.