Home / 20,743.20-31,114.80-19,349.10

Finding the Fourth Proportional to 20,743.20, 31,114.80 and 19,349.10

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Solution

The fourth proportional to 20,743.20, 31,114.80 and 19,349.10 is: 29,023.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.20 : 31,114.80 = 19,349.10 : x
  2. Step 2: Convert to fraction form
    20,743.20/31,114.80 = 19,349.10/x
  3. Step 3: Cross multiply
    20,743.20x = 31,114.80 × 19,349.10
  4. Step 4: Simplify right side
    20,743.20x = 602,043,376.68
  5. Step 5: Solve for x
    x = 602,043,376.68/20,743.20
  6. Step 6: Final answer
    x = 29,023.65

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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.