Home / 11,478.57-15,840.42-6,442.79

Finding the Fourth Proportional to 11,478.57, 15,840.42 and 6,442.79

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Solution

The fourth proportional to 11,478.57, 15,840.42 and 6,442.79 is: 8,891.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,478.57 : 15,840.42 = 6,442.79 : x
  2. Step 2: Convert to fraction form
    11,478.57/15,840.42 = 6,442.79/x
  3. Step 3: Cross multiply
    11,478.57x = 15,840.42 × 6,442.79
  4. Step 4: Simplify right side
    11,478.57x = 102,056,499.57
  5. Step 5: Solve for x
    x = 102,056,499.57/11,478.57
  6. Step 6: Final answer
    x = 8,891.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.