Home / 8,795.76-12,139.20-5,440.80

Finding the Fourth Proportional to 8,795.76, 12,139.20 and 5,440.80

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Solution

The fourth proportional to 8,795.76, 12,139.20 and 5,440.80 is: 7,508.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,795.76 : 12,139.20 = 5,440.80 : x
  2. Step 2: Convert to fraction form
    8,795.76/12,139.20 = 5,440.80/x
  3. Step 3: Cross multiply
    8,795.76x = 12,139.20 × 5,440.80
  4. Step 4: Simplify right side
    8,795.76x = 66,046,959.36
  5. Step 5: Solve for x
    x = 66,046,959.36/8,795.76
  6. Step 6: Final answer
    x = 7,508.95

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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.