Home / 10,072.20-15,110.70-5,142.60

Finding the Fourth Proportional to 10,072.20, 15,110.70 and 5,142.60

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Solution

The fourth proportional to 10,072.20, 15,110.70 and 5,142.60 is: 7,715.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,072.20 : 15,110.70 = 5,142.60 : x
  2. Step 2: Convert to fraction form
    10,072.20/15,110.70 = 5,142.60/x
  3. Step 3: Cross multiply
    10,072.20x = 15,110.70 × 5,142.60
  4. Step 4: Simplify right side
    10,072.20x = 77,708,285.82
  5. Step 5: Solve for x
    x = 77,708,285.82/10,072.20
  6. Step 6: Final answer
    x = 7,715.13

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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.