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Finding the Fourth Proportional to 17,691.60, 26,538.77 and 7,156.64

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Solution

The fourth proportional to 17,691.60, 26,538.77 and 7,156.64 is: 10,735.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,691.60 : 26,538.77 = 7,156.64 : x
  2. Step 2: Convert to fraction form
    17,691.60/26,538.77 = 7,156.64/x
  3. Step 3: Cross multiply
    17,691.60x = 26,538.77 × 7,156.64
  4. Step 4: Simplify right side
    17,691.60x = 189,928,254.46
  5. Step 5: Solve for x
    x = 189,928,254.46/17,691.60
  6. Step 6: Final answer
    x = 10,735.50

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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.