Home / 15,722.80-21,696.68-8,649.04

Finding the Fourth Proportional to 15,722.80, 21,696.68 and 8,649.04

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Solution

The fourth proportional to 15,722.80, 21,696.68 and 8,649.04 is: 11,935.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,722.80 : 21,696.68 = 8,649.04 : x
  2. Step 2: Convert to fraction form
    15,722.80/21,696.68 = 8,649.04/x
  3. Step 3: Cross multiply
    15,722.80x = 21,696.68 × 8,649.04
  4. Step 4: Simplify right side
    15,722.80x = 187,655,453.19
  5. Step 5: Solve for x
    x = 187,655,453.19/15,722.80
  6. Step 6: Final answer
    x = 11,935.24

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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.