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Finding the Fourth Proportional to 15,002.78, 20,705.10 and 8,714.76

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Solution

The fourth proportional to 15,002.78, 20,705.10 and 8,714.76 is: 12,027.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,002.78 : 20,705.10 = 8,714.76 : x
  2. Step 2: Convert to fraction form
    15,002.78/20,705.10 = 8,714.76/x
  3. Step 3: Cross multiply
    15,002.78x = 20,705.10 × 8,714.76
  4. Step 4: Simplify right side
    15,002.78x = 180,439,977.28
  5. Step 5: Solve for x
    x = 180,439,977.28/15,002.78
  6. Step 6: Final answer
    x = 12,027.10

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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.