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Finding the Fourth Proportional to 8,695.68, 11,988.48 and 7,198.08

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Solution

The fourth proportional to 8,695.68, 11,988.48 and 7,198.08 is: 9,923.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.68 : 11,988.48 = 7,198.08 : x
  2. Step 2: Convert to fraction form
    8,695.68/11,988.48 = 7,198.08/x
  3. Step 3: Cross multiply
    8,695.68x = 11,988.48 × 7,198.08
  4. Step 4: Simplify right side
    8,695.68x = 86,294,038.12
  5. Step 5: Solve for x
    x = 86,294,038.12/8,695.68
  6. Step 6: Final answer
    x = 9,923.78

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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.