Home / 8,191.28-12,275.94-7,666.40

Finding the Fourth Proportional to 8,191.28, 12,275.94 and 7,666.40

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Solution

The fourth proportional to 8,191.28, 12,275.94 and 7,666.40 is: 11,489.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,191.28 : 12,275.94 = 7,666.40 : x
  2. Step 2: Convert to fraction form
    8,191.28/12,275.94 = 7,666.40/x
  3. Step 3: Cross multiply
    8,191.28x = 12,275.94 × 7,666.40
  4. Step 4: Simplify right side
    8,191.28x = 94,112,266.42
  5. Step 5: Solve for x
    x = 94,112,266.42/8,191.28
  6. Step 6: Final answer
    x = 11,489.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.