Home / 20,432.80-28,196.48-11,480.68

Finding the Fourth Proportional to 20,432.80, 28,196.48 and 11,480.68

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Solution

The fourth proportional to 20,432.80, 28,196.48 and 11,480.68 is: 15,842.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.80 : 28,196.48 = 11,480.68 : x
  2. Step 2: Convert to fraction form
    20,432.80/28,196.48 = 11,480.68/x
  3. Step 3: Cross multiply
    20,432.80x = 28,196.48 × 11,480.68
  4. Step 4: Simplify right side
    20,432.80x = 323,714,636.11
  5. Step 5: Solve for x
    x = 323,714,636.11/20,432.80
  6. Step 6: Final answer
    x = 15,842.89

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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.