Home / 20,468.72-28,237.96-13,394.80

Finding the Fourth Proportional to 20,468.72, 28,237.96 and 13,394.80

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Solution

The fourth proportional to 20,468.72, 28,237.96 and 13,394.80 is: 18,479.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.72 : 28,237.96 = 13,394.80 : x
  2. Step 2: Convert to fraction form
    20,468.72/28,237.96 = 13,394.80/x
  3. Step 3: Cross multiply
    20,468.72x = 28,237.96 × 13,394.80
  4. Step 4: Simplify right side
    20,468.72x = 378,241,826.61
  5. Step 5: Solve for x
    x = 378,241,826.61/20,468.72
  6. Step 6: Final answer
    x = 18,479.02

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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.