Home / 20,189.40-30,247.65-18,877.20

Finding the Fourth Proportional to 20,189.40, 30,247.65 and 18,877.20

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Solution

The fourth proportional to 20,189.40, 30,247.65 and 18,877.20 is: 28,281.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.40 : 30,247.65 = 18,877.20 : x
  2. Step 2: Convert to fraction form
    20,189.40/30,247.65 = 18,877.20/x
  3. Step 3: Cross multiply
    20,189.40x = 30,247.65 × 18,877.20
  4. Step 4: Simplify right side
    20,189.40x = 570,990,938.58
  5. Step 5: Solve for x
    x = 570,990,938.58/20,189.40
  6. Step 6: Final answer
    x = 28,281.72

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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.