Home / 12,078.54-18,117.72-7,944.66

Finding the Fourth Proportional to 12,078.54, 18,117.72 and 7,944.66

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Solution

The fourth proportional to 12,078.54, 18,117.72 and 7,944.66 is: 11,916.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.54 : 18,117.72 = 7,944.66 : x
  2. Step 2: Convert to fraction form
    12,078.54/18,117.72 = 7,944.66/x
  3. Step 3: Cross multiply
    12,078.54x = 18,117.72 × 7,944.66
  4. Step 4: Simplify right side
    12,078.54x = 143,939,125.38
  5. Step 5: Solve for x
    x = 143,939,125.38/12,078.54
  6. Step 6: Final answer
    x = 11,916.93

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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.