Home / 20,887.31-31,293.21-13,850.57

Finding the Fourth Proportional to 20,887.31, 31,293.21 and 13,850.57

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Solution

The fourth proportional to 20,887.31, 31,293.21 and 13,850.57 is: 20,750.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.31 : 31,293.21 = 13,850.57 : x
  2. Step 2: Convert to fraction form
    20,887.31/31,293.21 = 13,850.57/x
  3. Step 3: Cross multiply
    20,887.31x = 31,293.21 × 13,850.57
  4. Step 4: Simplify right side
    20,887.31x = 433,428,795.63
  5. Step 5: Solve for x
    x = 433,428,795.63/20,887.31
  6. Step 6: Final answer
    x = 20,750.82

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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.