Home / 20,612.13-28,444.73-11,180.76

Finding the Fourth Proportional to 20,612.13, 28,444.73 and 11,180.76

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Solution

The fourth proportional to 20,612.13, 28,444.73 and 11,180.76 is: 15,429.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.13 : 28,444.73 = 11,180.76 : x
  2. Step 2: Convert to fraction form
    20,612.13/28,444.73 = 11,180.76/x
  3. Step 3: Cross multiply
    20,612.13x = 28,444.73 × 11,180.76
  4. Step 4: Simplify right side
    20,612.13x = 318,033,699.39
  5. Step 5: Solve for x
    x = 318,033,699.39/20,612.13
  6. Step 6: Final answer
    x = 15,429.44

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Half scale
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Double scale
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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.