Home / 12,939.48-17,865.16-8,696.87

Finding the Fourth Proportional to 12,939.48, 17,865.16 and 8,696.87

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Solution

The fourth proportional to 12,939.48, 17,865.16 and 8,696.87 is: 12,007.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.48 : 17,865.16 = 8,696.87 : x
  2. Step 2: Convert to fraction form
    12,939.48/17,865.16 = 8,696.87/x
  3. Step 3: Cross multiply
    12,939.48x = 17,865.16 × 8,696.87
  4. Step 4: Simplify right side
    12,939.48x = 155,370,929.98
  5. Step 5: Solve for x
    x = 155,370,929.98/12,939.48
  6. Step 6: Final answer
    x = 12,007.51

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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.