Home / 20,394.38-28,118.14-13,211.91

Finding the Fourth Proportional to 20,394.38, 28,118.14 and 13,211.91

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Solution

The fourth proportional to 20,394.38, 28,118.14 and 13,211.91 is: 18,215.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.38 : 28,118.14 = 13,211.91 : x
  2. Step 2: Convert to fraction form
    20,394.38/28,118.14 = 13,211.91/x
  3. Step 3: Cross multiply
    20,394.38x = 28,118.14 × 13,211.91
  4. Step 4: Simplify right side
    20,394.38x = 371,494,302.02
  5. Step 5: Solve for x
    x = 371,494,302.02/20,394.38
  6. Step 6: Final answer
    x = 18,215.52

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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.