Home / 12,943.80-17,865.90-7,640.46

Finding the Fourth Proportional to 12,943.80, 17,865.90 and 7,640.46

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Solution

The fourth proportional to 12,943.80, 17,865.90 and 7,640.46 is: 10,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,943.80 : 17,865.90 = 7,640.46 : x
  2. Step 2: Convert to fraction form
    12,943.80/17,865.90 = 7,640.46/x
  3. Step 3: Cross multiply
    12,943.80x = 17,865.90 × 7,640.46
  4. Step 4: Simplify right side
    12,943.80x = 136,503,694.31
  5. Step 5: Solve for x
    x = 136,503,694.31/12,943.80
  6. Step 6: Final answer
    x = 10,545.87

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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.