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Finding the Fourth Proportional to 8,957.90, 12,358.62 and 5,419.82

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Solution

The fourth proportional to 8,957.90, 12,358.62 and 5,419.82 is: 7,477.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.90 : 12,358.62 = 5,419.82 : x
  2. Step 2: Convert to fraction form
    8,957.90/12,358.62 = 5,419.82/x
  3. Step 3: Cross multiply
    8,957.90x = 12,358.62 × 5,419.82
  4. Step 4: Simplify right side
    8,957.90x = 66,981,434.06
  5. Step 5: Solve for x
    x = 66,981,434.06/8,957.90
  6. Step 6: Final answer
    x = 7,477.36

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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.