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Finding the Fourth Proportional to 8,539.70, 12,809.55 and 5,751.28

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Solution

The fourth proportional to 8,539.70, 12,809.55 and 5,751.28 is: 8,626.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,539.70 : 12,809.55 = 5,751.28 : x
  2. Step 2: Convert to fraction form
    8,539.70/12,809.55 = 5,751.28/x
  3. Step 3: Cross multiply
    8,539.70x = 12,809.55 × 5,751.28
  4. Step 4: Simplify right side
    8,539.70x = 73,671,244.68
  5. Step 5: Solve for x
    x = 73,671,244.68/8,539.70
  6. Step 6: Final answer
    x = 8,626.91

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Similar ratio
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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.