Home / 28,211.25-38,934.36-15,638.43

Finding the Fourth Proportional to 28,211.25, 38,934.36 and 15,638.43

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Solution

The fourth proportional to 28,211.25, 38,934.36 and 15,638.43 is: 21,582.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.25 : 38,934.36 = 15,638.43 : x
  2. Step 2: Convert to fraction form
    28,211.25/38,934.36 = 15,638.43/x
  3. Step 3: Cross multiply
    28,211.25x = 38,934.36 × 15,638.43
  4. Step 4: Simplify right side
    28,211.25x = 608,872,263.45
  5. Step 5: Solve for x
    x = 608,872,263.45/28,211.25
  6. Step 6: Final answer
    x = 21,582.60

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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.