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Finding the Fourth Proportional to 8,700.42, 11,995.38 and 7,105.53

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Solution

The fourth proportional to 8,700.42, 11,995.38 and 7,105.53 is: 9,796.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.42 : 11,995.38 = 7,105.53 : x
  2. Step 2: Convert to fraction form
    8,700.42/11,995.38 = 7,105.53/x
  3. Step 3: Cross multiply
    8,700.42x = 11,995.38 × 7,105.53
  4. Step 4: Simplify right side
    8,700.42x = 85,233,532.45
  5. Step 5: Solve for x
    x = 85,233,532.45/8,700.42
  6. Step 6: Final answer
    x = 9,796.48

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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.