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Finding the Fourth Proportional to 15,019.90, 20,725.64 and 8,304.61

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Solution

The fourth proportional to 15,019.90, 20,725.64 and 8,304.61 is: 11,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.90 : 20,725.64 = 8,304.61 : x
  2. Step 2: Convert to fraction form
    15,019.90/20,725.64 = 8,304.61/x
  3. Step 3: Cross multiply
    15,019.90x = 20,725.64 × 8,304.61
  4. Step 4: Simplify right side
    15,019.90x = 172,118,333.87
  5. Step 5: Solve for x
    x = 172,118,333.87/15,019.90
  6. Step 6: Final answer
    x = 11,459.35

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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.