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Finding the Fourth Proportional to 8,666.88, 11,952.95 and 6,987.75

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Solution

The fourth proportional to 8,666.88, 11,952.95 and 6,987.75 is: 9,637.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.88 : 11,952.95 = 6,987.75 : x
  2. Step 2: Convert to fraction form
    8,666.88/11,952.95 = 6,987.75/x
  3. Step 3: Cross multiply
    8,666.88x = 11,952.95 × 6,987.75
  4. Step 4: Simplify right side
    8,666.88x = 83,524,191.42
  5. Step 5: Solve for x
    x = 83,524,191.42/8,666.88
  6. Step 6: Final answer
    x = 9,637.17

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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.