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Finding the Fourth Proportional to 15,018.95, 20,725.78 and 8,304.40

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Solution

The fourth proportional to 15,018.95, 20,725.78 and 8,304.40 is: 11,459.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.95 : 20,725.78 = 8,304.40 : x
  2. Step 2: Convert to fraction form
    15,018.95/20,725.78 = 8,304.40/x
  3. Step 3: Cross multiply
    15,018.95x = 20,725.78 × 8,304.40
  4. Step 4: Simplify right side
    15,018.95x = 172,115,188.15
  5. Step 5: Solve for x
    x = 172,115,188.15/15,018.95
  6. Step 6: Final answer
    x = 11,459.87

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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.