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Finding the Fourth Proportional to 8,964.47, 12,371.94 and 5,187.58

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Solution

The fourth proportional to 8,964.47, 12,371.94 and 5,187.58 is: 7,159.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,964.47 : 12,371.94 = 5,187.58 : x
  2. Step 2: Convert to fraction form
    8,964.47/12,371.94 = 5,187.58/x
  3. Step 3: Cross multiply
    8,964.47x = 12,371.94 × 5,187.58
  4. Step 4: Simplify right side
    8,964.47x = 64,180,397.58
  5. Step 5: Solve for x
    x = 64,180,397.58/8,964.47
  6. Step 6: Final answer
    x = 7,159.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.