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Finding the Fourth Proportional to 8,612.70, 12,897.45 and 5,675.10

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Solution

The fourth proportional to 8,612.70, 12,897.45 and 5,675.10 is: 8,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.70 : 12,897.45 = 5,675.10 : x
  2. Step 2: Convert to fraction form
    8,612.70/12,897.45 = 5,675.10/x
  3. Step 3: Cross multiply
    8,612.70x = 12,897.45 × 5,675.10
  4. Step 4: Simplify right side
    8,612.70x = 73,194,318.50
  5. Step 5: Solve for x
    x = 73,194,318.50/8,612.70
  6. Step 6: Final answer
    x = 8,498.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.