Home / 21,408.12-32,120.28-8,261.28

Finding the Fourth Proportional to 21,408.12, 32,120.28 and 8,261.28

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Solution

The fourth proportional to 21,408.12, 32,120.28 and 8,261.28 is: 12,395.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.12 : 32,120.28 = 8,261.28 : x
  2. Step 2: Convert to fraction form
    21,408.12/32,120.28 = 8,261.28/x
  3. Step 3: Cross multiply
    21,408.12x = 32,120.28 × 8,261.28
  4. Step 4: Simplify right side
    21,408.12x = 265,354,626.76
  5. Step 5: Solve for x
    x = 265,354,626.76/21,408.12
  6. Step 6: Final answer
    x = 12,395.05

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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.