Home / 20,990.06-31,485.15-8,510.33

Finding the Fourth Proportional to 20,990.06, 31,485.15 and 8,510.33

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Solution

The fourth proportional to 20,990.06, 31,485.15 and 8,510.33 is: 12,765.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.06 : 31,485.15 = 8,510.33 : x
  2. Step 2: Convert to fraction form
    20,990.06/31,485.15 = 8,510.33/x
  3. Step 3: Cross multiply
    20,990.06x = 31,485.15 × 8,510.33
  4. Step 4: Simplify right side
    20,990.06x = 267,948,859.17
  5. Step 5: Solve for x
    x = 267,948,859.17/20,990.06
  6. Step 6: Final answer
    x = 12,765.51

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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.