Home / 20,891.12-31,336.08-7,743.20

Finding the Fourth Proportional to 20,891.12, 31,336.08 and 7,743.20

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Solution

The fourth proportional to 20,891.12, 31,336.08 and 7,743.20 is: 11,614.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.12 : 31,336.08 = 7,743.20 : x
  2. Step 2: Convert to fraction form
    20,891.12/31,336.08 = 7,743.20/x
  3. Step 3: Cross multiply
    20,891.12x = 31,336.08 × 7,743.20
  4. Step 4: Simplify right side
    20,891.12x = 242,641,534.66
  5. Step 5: Solve for x
    x = 242,641,534.66/20,891.12
  6. Step 6: Final answer
    x = 11,614.58

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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.