Home / 21,451.76-32,169.72-7,408.20

Finding the Fourth Proportional to 21,451.76, 32,169.72 and 7,408.20

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Solution

The fourth proportional to 21,451.76, 32,169.72 and 7,408.20 is: 11,109.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,451.76 : 32,169.72 = 7,408.20 : x
  2. Step 2: Convert to fraction form
    21,451.76/32,169.72 = 7,408.20/x
  3. Step 3: Cross multiply
    21,451.76x = 32,169.72 × 7,408.20
  4. Step 4: Simplify right side
    21,451.76x = 238,319,719.70
  5. Step 5: Solve for x
    x = 238,319,719.70/21,451.76
  6. Step 6: Final answer
    x = 11,109.56

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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.