Home / 31,118.54-42,882.20-22,140.90

Finding the Fourth Proportional to 31,118.54, 42,882.20 and 22,140.90

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Solution

The fourth proportional to 31,118.54, 42,882.20 and 22,140.90 is: 30,510.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,118.54 : 42,882.20 = 22,140.90 : x
  2. Step 2: Convert to fraction form
    31,118.54/42,882.20 = 22,140.90/x
  3. Step 3: Cross multiply
    31,118.54x = 42,882.20 × 22,140.90
  4. Step 4: Simplify right side
    31,118.54x = 949,450,501.98
  5. Step 5: Solve for x
    x = 949,450,501.98/31,118.54
  6. Step 6: Final answer
    x = 30,510.77

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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.