Home / 12,728.91-17,564.13-7,424.22

Finding the Fourth Proportional to 12,728.91, 17,564.13 and 7,424.22

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Solution

The fourth proportional to 12,728.91, 17,564.13 and 7,424.22 is: 10,244.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.91 : 17,564.13 = 7,424.22 : x
  2. Step 2: Convert to fraction form
    12,728.91/17,564.13 = 7,424.22/x
  3. Step 3: Cross multiply
    12,728.91x = 17,564.13 × 7,424.22
  4. Step 4: Simplify right side
    12,728.91x = 130,399,965.23
  5. Step 5: Solve for x
    x = 130,399,965.23/12,728.91
  6. Step 6: Final answer
    x = 10,244.39

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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.