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Finding the Fourth Proportional to 8,707.17, 12,015.90 and 5,170.62

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Solution

The fourth proportional to 8,707.17, 12,015.90 and 5,170.62 is: 7,135.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.17 : 12,015.90 = 5,170.62 : x
  2. Step 2: Convert to fraction form
    8,707.17/12,015.90 = 5,170.62/x
  3. Step 3: Cross multiply
    8,707.17x = 12,015.90 × 5,170.62
  4. Step 4: Simplify right side
    8,707.17x = 62,129,652.86
  5. Step 5: Solve for x
    x = 62,129,652.86/8,707.17
  6. Step 6: Final answer
    x = 7,135.46

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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.