Home / 11,278.78-16,921.14-4,258.90

Finding the Fourth Proportional to 11,278.78, 16,921.14 and 4,258.90

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Solution

The fourth proportional to 11,278.78, 16,921.14 and 4,258.90 is: 6,389.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.78 : 16,921.14 = 4,258.90 : x
  2. Step 2: Convert to fraction form
    11,278.78/16,921.14 = 4,258.90/x
  3. Step 3: Cross multiply
    11,278.78x = 16,921.14 × 4,258.90
  4. Step 4: Simplify right side
    11,278.78x = 72,065,443.15
  5. Step 5: Solve for x
    x = 72,065,443.15/11,278.78
  6. Step 6: Final answer
    x = 6,389.47

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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.