Home / 20,890.80-31,348.96-9,047.74

Finding the Fourth Proportional to 20,890.80, 31,348.96 and 9,047.74

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Solution

The fourth proportional to 20,890.80, 31,348.96 and 9,047.74 is: 13,577.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.80 : 31,348.96 = 9,047.74 : x
  2. Step 2: Convert to fraction form
    20,890.80/31,348.96 = 9,047.74/x
  3. Step 3: Cross multiply
    20,890.80x = 31,348.96 × 9,047.74
  4. Step 4: Simplify right side
    20,890.80x = 283,637,194.11
  5. Step 5: Solve for x
    x = 283,637,194.11/20,890.80
  6. Step 6: Final answer
    x = 13,577.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.