Home / 20,957.76-31,443.12-7,116.48

Finding the Fourth Proportional to 20,957.76, 31,443.12 and 7,116.48

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Solution

The fourth proportional to 20,957.76, 31,443.12 and 7,116.48 is: 10,676.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.76 : 31,443.12 = 7,116.48 : x
  2. Step 2: Convert to fraction form
    20,957.76/31,443.12 = 7,116.48/x
  3. Step 3: Cross multiply
    20,957.76x = 31,443.12 × 7,116.48
  4. Step 4: Simplify right side
    20,957.76x = 223,764,334.62
  5. Step 5: Solve for x
    x = 223,764,334.62/20,957.76
  6. Step 6: Final answer
    x = 10,676.92

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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.