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Finding the Fourth Proportional to 8,458.71, 12,688.47 and 2,218.88

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Solution

The fourth proportional to 8,458.71, 12,688.47 and 2,218.88 is: 3,328.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.71 : 12,688.47 = 2,218.88 : x
  2. Step 2: Convert to fraction form
    8,458.71/12,688.47 = 2,218.88/x
  3. Step 3: Cross multiply
    8,458.71x = 12,688.47 × 2,218.88
  4. Step 4: Simplify right side
    8,458.71x = 28,154,192.31
  5. Step 5: Solve for x
    x = 28,154,192.31/8,458.71
  6. Step 6: Final answer
    x = 3,328.43

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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.