Home / 20,689.40-31,034.10-15,440.60

Finding the Fourth Proportional to 20,689.40, 31,034.10 and 15,440.60

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Solution

The fourth proportional to 20,689.40, 31,034.10 and 15,440.60 is: 23,160.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.40 : 31,034.10 = 15,440.60 : x
  2. Step 2: Convert to fraction form
    20,689.40/31,034.10 = 15,440.60/x
  3. Step 3: Cross multiply
    20,689.40x = 31,034.10 × 15,440.60
  4. Step 4: Simplify right side
    20,689.40x = 479,185,124.46
  5. Step 5: Solve for x
    x = 479,185,124.46/20,689.40
  6. Step 6: Final answer
    x = 23,160.90

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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.