Home / 20,430.62-28,194.92-11,479.72

Finding the Fourth Proportional to 20,430.62, 28,194.92 and 11,479.72

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Solution

The fourth proportional to 20,430.62, 28,194.92 and 11,479.72 is: 15,842.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.62 : 28,194.92 = 11,479.72 : x
  2. Step 2: Convert to fraction form
    20,430.62/28,194.92 = 11,479.72/x
  3. Step 3: Cross multiply
    20,430.62x = 28,194.92 × 11,479.72
  4. Step 4: Simplify right side
    20,430.62x = 323,669,787.02
  5. Step 5: Solve for x
    x = 323,669,787.02/20,430.62
  6. Step 6: Final answer
    x = 15,842.39

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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.