Home / 15,921.68-23,835-13,135.28

Finding the Fourth Proportional to 15,921.68, 23,835 and 13,135.28

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Solution

The fourth proportional to 15,921.68, 23,835 and 13,135.28 is: 19,663.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.68 : 23,835 = 13,135.28 : x
  2. Step 2: Convert to fraction form
    15,921.68/23,835 = 13,135.28/x
  3. Step 3: Cross multiply
    15,921.68x = 23,835 × 13,135.28
  4. Step 4: Simplify right side
    15,921.68x = 313,079,398.80
  5. Step 5: Solve for x
    x = 313,079,398.80/15,921.68
  6. Step 6: Final answer
    x = 19,663.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.