Home / 20,342.56-28,073.68-11,388.28

Finding the Fourth Proportional to 20,342.56, 28,073.68 and 11,388.28

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Solution

The fourth proportional to 20,342.56, 28,073.68 and 11,388.28 is: 15,716.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.56 : 28,073.68 = 11,388.28 : x
  2. Step 2: Convert to fraction form
    20,342.56/28,073.68 = 11,388.28/x
  3. Step 3: Cross multiply
    20,342.56x = 28,073.68 × 11,388.28
  4. Step 4: Simplify right side
    20,342.56x = 319,710,928.47
  5. Step 5: Solve for x
    x = 319,710,928.47/20,342.56
  6. Step 6: Final answer
    x = 15,716.36

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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.