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Finding the Fourth Proportional to 18,424.28, 27,641.88 and 8,569.40

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Solution

The fourth proportional to 18,424.28, 27,641.88 and 8,569.40 is: 12,856.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,424.28 : 27,641.88 = 8,569.40 : x
  2. Step 2: Convert to fraction form
    18,424.28/27,641.88 = 8,569.40/x
  3. Step 3: Cross multiply
    18,424.28x = 27,641.88 × 8,569.40
  4. Step 4: Simplify right side
    18,424.28x = 236,874,326.47
  5. Step 5: Solve for x
    x = 236,874,326.47/18,424.28
  6. Step 6: Final answer
    x = 12,856.64

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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.