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Finding the Fourth Proportional to 15,641.43, 21,585.44 and 8,567.39

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Solution

The fourth proportional to 15,641.43, 21,585.44 and 8,567.39 is: 11,823.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,641.43 : 21,585.44 = 8,567.39 : x
  2. Step 2: Convert to fraction form
    15,641.43/21,585.44 = 8,567.39/x
  3. Step 3: Cross multiply
    15,641.43x = 21,585.44 × 8,567.39
  4. Step 4: Simplify right side
    15,641.43x = 184,930,882.80
  5. Step 5: Solve for x
    x = 184,930,882.80/15,641.43
  6. Step 6: Final answer
    x = 11,823.14

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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.