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Finding the Fourth Proportional to 8,697.74, 11,997.54 and 7,686.20

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Solution

The fourth proportional to 8,697.74, 11,997.54 and 7,686.20 is: 10,602.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.74 : 11,997.54 = 7,686.20 : x
  2. Step 2: Convert to fraction form
    8,697.74/11,997.54 = 7,686.20/x
  3. Step 3: Cross multiply
    8,697.74x = 11,997.54 × 7,686.20
  4. Step 4: Simplify right side
    8,697.74x = 92,215,491.95
  5. Step 5: Solve for x
    x = 92,215,491.95/8,697.74
  6. Step 6: Final answer
    x = 10,602.24

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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.