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Finding the Fourth Proportional to 7,165, 9,888.78 and 4,372.12

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Solution

The fourth proportional to 7,165, 9,888.78 and 4,372.12 is: 6,034.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,165 : 9,888.78 = 4,372.12 : x
  2. Step 2: Convert to fraction form
    7,165/9,888.78 = 4,372.12/x
  3. Step 3: Cross multiply
    7,165x = 9,888.78 × 4,372.12
  4. Step 4: Simplify right side
    7,165x = 43,234,932.81
  5. Step 5: Solve for x
    x = 43,234,932.81/7,165
  6. Step 6: Final answer
    x = 6,034.18

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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.