Home / 20,845.80-31,254.88-11,490.30

Finding the Fourth Proportional to 20,845.80, 31,254.88 and 11,490.30

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Solution

The fourth proportional to 20,845.80, 31,254.88 and 11,490.30 is: 17,227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.80 : 31,254.88 = 11,490.30 : x
  2. Step 2: Convert to fraction form
    20,845.80/31,254.88 = 11,490.30/x
  3. Step 3: Cross multiply
    20,845.80x = 31,254.88 × 11,490.30
  4. Step 4: Simplify right side
    20,845.80x = 359,127,947.66
  5. Step 5: Solve for x
    x = 359,127,947.66/20,845.80
  6. Step 6: Final answer
    x = 17,227.83

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1.5x scale

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.