Home / 20,990.31-28,965.51-12,037.38

Finding the Fourth Proportional to 20,990.31, 28,965.51 and 12,037.38

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Solution

The fourth proportional to 20,990.31, 28,965.51 and 12,037.38 is: 16,610.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.31 : 28,965.51 = 12,037.38 : x
  2. Step 2: Convert to fraction form
    20,990.31/28,965.51 = 12,037.38/x
  3. Step 3: Cross multiply
    20,990.31x = 28,965.51 × 12,037.38
  4. Step 4: Simplify right side
    20,990.31x = 348,668,850.76
  5. Step 5: Solve for x
    x = 348,668,850.76/20,990.31
  6. Step 6: Final answer
    x = 16,610.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.