Home / 12,278.40-18,427.20-5,705.40

Finding the Fourth Proportional to 12,278.40, 18,427.20 and 5,705.40

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Solution

The fourth proportional to 12,278.40, 18,427.20 and 5,705.40 is: 8,562.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.40 : 18,427.20 = 5,705.40 : x
  2. Step 2: Convert to fraction form
    12,278.40/18,427.20 = 5,705.40/x
  3. Step 3: Cross multiply
    12,278.40x = 18,427.20 × 5,705.40
  4. Step 4: Simplify right side
    12,278.40x = 105,134,546.88
  5. Step 5: Solve for x
    x = 105,134,546.88/12,278.40
  6. Step 6: Final answer
    x = 8,562.56

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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.