Home / 20,223.60-30,335.40-18,409.20

Finding the Fourth Proportional to 20,223.60, 30,335.40 and 18,409.20

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Solution

The fourth proportional to 20,223.60, 30,335.40 and 18,409.20 is: 27,613.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,223.60 : 30,335.40 = 18,409.20 : x
  2. Step 2: Convert to fraction form
    20,223.60/30,335.40 = 18,409.20/x
  3. Step 3: Cross multiply
    20,223.60x = 30,335.40 × 18,409.20
  4. Step 4: Simplify right side
    20,223.60x = 558,450,445.68
  5. Step 5: Solve for x
    x = 558,450,445.68/20,223.60
  6. Step 6: Final answer
    x = 27,613.80

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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.