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Finding the Fourth Proportional to 8,705.58, 12,010.08 and 6,472.78

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Solution

The fourth proportional to 8,705.58, 12,010.08 and 6,472.78 is: 8,929.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.58 : 12,010.08 = 6,472.78 : x
  2. Step 2: Convert to fraction form
    8,705.58/12,010.08 = 6,472.78/x
  3. Step 3: Cross multiply
    8,705.58x = 12,010.08 × 6,472.78
  4. Step 4: Simplify right side
    8,705.58x = 77,738,605.62
  5. Step 5: Solve for x
    x = 77,738,605.62/8,705.58
  6. Step 6: Final answer
    x = 8,929.74

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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.