Home / 7,877.28-11,799.72-5,690.40

Finding the Fourth Proportional to 7,877.28, 11,799.72 and 5,690.40

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Solution

The fourth proportional to 7,877.28, 11,799.72 and 5,690.40 is: 8,523.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.28 : 11,799.72 = 5,690.40 : x
  2. Step 2: Convert to fraction form
    7,877.28/11,799.72 = 5,690.40/x
  3. Step 3: Cross multiply
    7,877.28x = 11,799.72 × 5,690.40
  4. Step 4: Simplify right side
    7,877.28x = 67,145,126.69
  5. Step 5: Solve for x
    x = 67,145,126.69/7,877.28
  6. Step 6: Final answer
    x = 8,523.90

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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.