Home / 7,981.20-11,012.76-4,443.75

Finding the Fourth Proportional to 7,981.20, 11,012.76 and 4,443.75

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Solution

The fourth proportional to 7,981.20, 11,012.76 and 4,443.75 is: 6,131.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.20 : 11,012.76 = 4,443.75 : x
  2. Step 2: Convert to fraction form
    7,981.20/11,012.76 = 4,443.75/x
  3. Step 3: Cross multiply
    7,981.20x = 11,012.76 × 4,443.75
  4. Step 4: Simplify right side
    7,981.20x = 48,937,952.25
  5. Step 5: Solve for x
    x = 48,937,952.25/7,981.20
  6. Step 6: Final answer
    x = 6,131.65

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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.