Home / 20,881.73-28,817.96-12,388.88

Finding the Fourth Proportional to 20,881.73, 28,817.96 and 12,388.88

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Solution

The fourth proportional to 20,881.73, 28,817.96 and 12,388.88 is: 17,097.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.73 : 28,817.96 = 12,388.88 : x
  2. Step 2: Convert to fraction form
    20,881.73/28,817.96 = 12,388.88/x
  3. Step 3: Cross multiply
    20,881.73x = 28,817.96 × 12,388.88
  4. Step 4: Simplify right side
    20,881.73x = 357,022,248.28
  5. Step 5: Solve for x
    x = 357,022,248.28/20,881.73
  6. Step 6: Final answer
    x = 17,097.35

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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.