Home / 28,203.28-38,920.56-15,628

Finding the Fourth Proportional to 28,203.28, 38,920.56 and 15,628

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Solution

The fourth proportional to 28,203.28, 38,920.56 and 15,628 is: 21,566.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.28 : 38,920.56 = 15,628 : x
  2. Step 2: Convert to fraction form
    28,203.28/38,920.56 = 15,628/x
  3. Step 3: Cross multiply
    28,203.28x = 38,920.56 × 15,628
  4. Step 4: Simplify right side
    28,203.28x = 608,250,511.68
  5. Step 5: Solve for x
    x = 608,250,511.68/28,203.28
  6. Step 6: Final answer
    x = 21,566.66

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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.