Home / 10,100.40-15,120.29-6,139.44

Finding the Fourth Proportional to 10,100.40, 15,120.29 and 6,139.44

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Solution

The fourth proportional to 10,100.40, 15,120.29 and 6,139.44 is: 9,190.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,100.40 : 15,120.29 = 6,139.44 : x
  2. Step 2: Convert to fraction form
    10,100.40/15,120.29 = 6,139.44/x
  3. Step 3: Cross multiply
    10,100.40x = 15,120.29 × 6,139.44
  4. Step 4: Simplify right side
    10,100.40x = 92,830,082.54
  5. Step 5: Solve for x
    x = 92,830,082.54/10,100.40
  6. Step 6: Final answer
    x = 9,190.73

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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.