Home / 20,755.11-31,130.36-7,427.57

Finding the Fourth Proportional to 20,755.11, 31,130.36 and 7,427.57

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Solution

The fourth proportional to 20,755.11, 31,130.36 and 7,427.57 is: 11,140.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.11 : 31,130.36 = 7,427.57 : x
  2. Step 2: Convert to fraction form
    20,755.11/31,130.36 = 7,427.57/x
  3. Step 3: Cross multiply
    20,755.11x = 31,130.36 × 7,427.57
  4. Step 4: Simplify right side
    20,755.11x = 231,222,946.59
  5. Step 5: Solve for x
    x = 231,222,946.59/20,755.11
  6. Step 6: Final answer
    x = 11,140.53

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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.