Home / 28,255.04-38,993.28-15,680

Finding the Fourth Proportional to 28,255.04, 38,993.28 and 15,680

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Solution

The fourth proportional to 28,255.04, 38,993.28 and 15,680 is: 21,639.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.04 : 38,993.28 = 15,680 : x
  2. Step 2: Convert to fraction form
    28,255.04/38,993.28 = 15,680/x
  3. Step 3: Cross multiply
    28,255.04x = 38,993.28 × 15,680
  4. Step 4: Simplify right side
    28,255.04x = 611,414,630.40
  5. Step 5: Solve for x
    x = 611,414,630.40/28,255.04
  6. Step 6: Final answer
    x = 21,639.14

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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.