Home / 20,320.31-28,036.65-13,948.85

Finding the Fourth Proportional to 20,320.31, 28,036.65 and 13,948.85

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Solution

The fourth proportional to 20,320.31, 28,036.65 and 13,948.85 is: 19,245.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.31 : 28,036.65 = 13,948.85 : x
  2. Step 2: Convert to fraction form
    20,320.31/28,036.65 = 13,948.85/x
  3. Step 3: Cross multiply
    20,320.31x = 28,036.65 × 13,948.85
  4. Step 4: Simplify right side
    20,320.31x = 391,079,025.35
  5. Step 5: Solve for x
    x = 391,079,025.35/20,320.31
  6. Step 6: Final answer
    x = 19,245.72

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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.