Home / 10,712.40-16,072.12-4,139.60

Finding the Fourth Proportional to 10,712.40, 16,072.12 and 4,139.60

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Solution

The fourth proportional to 10,712.40, 16,072.12 and 4,139.60 is: 6,210.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,712.40 : 16,072.12 = 4,139.60 : x
  2. Step 2: Convert to fraction form
    10,712.40/16,072.12 = 4,139.60/x
  3. Step 3: Cross multiply
    10,712.40x = 16,072.12 × 4,139.60
  4. Step 4: Simplify right side
    10,712.40x = 66,532,147.95
  5. Step 5: Solve for x
    x = 66,532,147.95/10,712.40
  6. Step 6: Final answer
    x = 6,210.76

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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.