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Finding the Fourth Proportional to 17,531.40, 26,245.90 and 15,688.20

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Solution

The fourth proportional to 17,531.40, 26,245.90 and 15,688.20 is: 23,486.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,531.40 : 26,245.90 = 15,688.20 : x
  2. Step 2: Convert to fraction form
    17,531.40/26,245.90 = 15,688.20/x
  3. Step 3: Cross multiply
    17,531.40x = 26,245.90 × 15,688.20
  4. Step 4: Simplify right side
    17,531.40x = 411,750,928.38
  5. Step 5: Solve for x
    x = 411,750,928.38/17,531.40
  6. Step 6: Final answer
    x = 23,486.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.