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Finding the Fourth Proportional to 15,017.91, 20,725.50 and 8,645.46

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Solution

The fourth proportional to 15,017.91, 20,725.50 and 8,645.46 is: 11,931.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,017.91 : 20,725.50 = 8,645.46 : x
  2. Step 2: Convert to fraction form
    15,017.91/20,725.50 = 8,645.46/x
  3. Step 3: Cross multiply
    15,017.91x = 20,725.50 × 8,645.46
  4. Step 4: Simplify right side
    15,017.91x = 179,181,481.23
  5. Step 5: Solve for x
    x = 179,181,481.23/15,017.91
  6. Step 6: Final answer
    x = 11,931.19

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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.