Home / 21,327.20-31,947.60-12,082.40

Finding the Fourth Proportional to 21,327.20, 31,947.60 and 12,082.40

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Solution

The fourth proportional to 21,327.20, 31,947.60 and 12,082.40 is: 18,099.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.20 : 31,947.60 = 12,082.40 : x
  2. Step 2: Convert to fraction form
    21,327.20/31,947.60 = 12,082.40/x
  3. Step 3: Cross multiply
    21,327.20x = 31,947.60 × 12,082.40
  4. Step 4: Simplify right side
    21,327.20x = 386,003,682.24
  5. Step 5: Solve for x
    x = 386,003,682.24/21,327.20
  6. Step 6: Final answer
    x = 18,099.13

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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.