Home / 12,278.35-18,407.12-4,378.49

Finding the Fourth Proportional to 12,278.35, 18,407.12 and 4,378.49

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Solution

The fourth proportional to 12,278.35, 18,407.12 and 4,378.49 is: 6,564.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.35 : 18,407.12 = 4,378.49 : x
  2. Step 2: Convert to fraction form
    12,278.35/18,407.12 = 4,378.49/x
  3. Step 3: Cross multiply
    12,278.35x = 18,407.12 × 4,378.49
  4. Step 4: Simplify right side
    12,278.35x = 80,595,345.95
  5. Step 5: Solve for x
    x = 80,595,345.95/12,278.35
  6. Step 6: Final answer
    x = 6,564.02

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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.