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Finding the Fourth Proportional to 8,398.65, 12,599.49 and 4,238.79

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Solution

The fourth proportional to 8,398.65, 12,599.49 and 4,238.79 is: 6,358.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.65 : 12,599.49 = 4,238.79 : x
  2. Step 2: Convert to fraction form
    8,398.65/12,599.49 = 4,238.79/x
  3. Step 3: Cross multiply
    8,398.65x = 12,599.49 × 4,238.79
  4. Step 4: Simplify right side
    8,398.65x = 53,406,592.22
  5. Step 5: Solve for x
    x = 53,406,592.22/8,398.65
  6. Step 6: Final answer
    x = 6,358.95

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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.