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Finding the Fourth Proportional to 8,618.04, 12,920.06 and 8,129.16

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Solution

The fourth proportional to 8,618.04, 12,920.06 and 8,129.16 is: 12,187.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.04 : 12,920.06 = 8,129.16 : x
  2. Step 2: Convert to fraction form
    8,618.04/12,920.06 = 8,129.16/x
  3. Step 3: Cross multiply
    8,618.04x = 12,920.06 × 8,129.16
  4. Step 4: Simplify right side
    8,618.04x = 105,029,234.95
  5. Step 5: Solve for x
    x = 105,029,234.95/8,618.04
  6. Step 6: Final answer
    x = 12,187.14

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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.