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Finding the Fourth Proportional to 15,017.85, 20,723.05 and 8,302.40

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Solution

The fourth proportional to 15,017.85, 20,723.05 and 8,302.40 is: 11,456.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,017.85 : 20,723.05 = 8,302.40 : x
  2. Step 2: Convert to fraction form
    15,017.85/20,723.05 = 8,302.40/x
  3. Step 3: Cross multiply
    15,017.85x = 20,723.05 × 8,302.40
  4. Step 4: Simplify right side
    15,017.85x = 172,050,905.19
  5. Step 5: Solve for x
    x = 172,050,905.19/15,017.85
  6. Step 6: Final answer
    x = 11,456.43

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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.