Home / 20,219.32-30,327.50-8,978.20

Finding the Fourth Proportional to 20,219.32, 30,327.50 and 8,978.20

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Solution

The fourth proportional to 20,219.32, 30,327.50 and 8,978.20 is: 13,466.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.32 : 30,327.50 = 8,978.20 : x
  2. Step 2: Convert to fraction form
    20,219.32/30,327.50 = 8,978.20/x
  3. Step 3: Cross multiply
    20,219.32x = 30,327.50 × 8,978.20
  4. Step 4: Simplify right side
    20,219.32x = 272,286,360.50
  5. Step 5: Solve for x
    x = 272,286,360.50/20,219.32
  6. Step 6: Final answer
    x = 13,466.64

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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.