Home / 20,963.76-31,445.62-7,112.76

Finding the Fourth Proportional to 20,963.76, 31,445.62 and 7,112.76

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Solution

The fourth proportional to 20,963.76, 31,445.62 and 7,112.76 is: 10,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.76 : 31,445.62 = 7,112.76 : x
  2. Step 2: Convert to fraction form
    20,963.76/31,445.62 = 7,112.76/x
  3. Step 3: Cross multiply
    20,963.76x = 31,445.62 × 7,112.76
  4. Step 4: Simplify right side
    20,963.76x = 223,665,148.11
  5. Step 5: Solve for x
    x = 223,665,148.11/20,963.76
  6. Step 6: Final answer
    x = 10,669.13

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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.