Home / 20,287.20-30,430.80-15,366.45

Finding the Fourth Proportional to 20,287.20, 30,430.80 and 15,366.45

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Solution

The fourth proportional to 20,287.20, 30,430.80 and 15,366.45 is: 23,049.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.20 : 30,430.80 = 15,366.45 : x
  2. Step 2: Convert to fraction form
    20,287.20/30,430.80 = 15,366.45/x
  3. Step 3: Cross multiply
    20,287.20x = 30,430.80 × 15,366.45
  4. Step 4: Simplify right side
    20,287.20x = 467,613,366.66
  5. Step 5: Solve for x
    x = 467,613,366.66/20,287.20
  6. Step 6: Final answer
    x = 23,049.68

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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.