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Finding the Fourth Proportional to 8,581.47, 12,810.05 and 7,418.95

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Solution

The fourth proportional to 8,581.47, 12,810.05 and 7,418.95 is: 11,074.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.47 : 12,810.05 = 7,418.95 : x
  2. Step 2: Convert to fraction form
    8,581.47/12,810.05 = 7,418.95/x
  3. Step 3: Cross multiply
    8,581.47x = 12,810.05 × 7,418.95
  4. Step 4: Simplify right side
    8,581.47x = 95,037,120.45
  5. Step 5: Solve for x
    x = 95,037,120.45/8,581.47
  6. Step 6: Final answer
    x = 11,074.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.