Home / 12,979.10-17,912.90-7,314.95

Finding the Fourth Proportional to 12,979.10, 17,912.90 and 7,314.95

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Solution

The fourth proportional to 12,979.10, 17,912.90 and 7,314.95 is: 10,095.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.10 : 17,912.90 = 7,314.95 : x
  2. Step 2: Convert to fraction form
    12,979.10/17,912.90 = 7,314.95/x
  3. Step 3: Cross multiply
    12,979.10x = 17,912.90 × 7,314.95
  4. Step 4: Simplify right side
    12,979.10x = 131,031,967.86
  5. Step 5: Solve for x
    x = 131,031,967.86/12,979.10
  6. Step 6: Final answer
    x = 10,095.61

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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.