Home / 7,515.20-11,272.80-5,182.40

Finding the Fourth Proportional to 7,515.20, 11,272.80 and 5,182.40

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Solution

The fourth proportional to 7,515.20, 11,272.80 and 5,182.40 is: 7,773.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,515.20 : 11,272.80 = 5,182.40 : x
  2. Step 2: Convert to fraction form
    7,515.20/11,272.80 = 5,182.40/x
  3. Step 3: Cross multiply
    7,515.20x = 11,272.80 × 5,182.40
  4. Step 4: Simplify right side
    7,515.20x = 58,420,158.72
  5. Step 5: Solve for x
    x = 58,420,158.72/7,515.20
  6. Step 6: Final answer
    x = 7,773.60

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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.