Home / 21,189.20-31,774.20-8,037.20

Finding the Fourth Proportional to 21,189.20, 31,774.20 and 8,037.20

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Solution

The fourth proportional to 21,189.20, 31,774.20 and 8,037.20 is: 12,052.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.20 : 31,774.20 = 8,037.20 : x
  2. Step 2: Convert to fraction form
    21,189.20/31,774.20 = 8,037.20/x
  3. Step 3: Cross multiply
    21,189.20x = 31,774.20 × 8,037.20
  4. Step 4: Simplify right side
    21,189.20x = 255,375,600.24
  5. Step 5: Solve for x
    x = 255,375,600.24/21,189.20
  6. Step 6: Final answer
    x = 12,052.16

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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.