Home / 15,928.76-21,979.77-8,757.49

Finding the Fourth Proportional to 15,928.76, 21,979.77 and 8,757.49

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Solution

The fourth proportional to 15,928.76, 21,979.77 and 8,757.49 is: 12,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.76 : 21,979.77 = 8,757.49 : x
  2. Step 2: Convert to fraction form
    15,928.76/21,979.77 = 8,757.49/x
  3. Step 3: Cross multiply
    15,928.76x = 21,979.77 × 8,757.49
  4. Step 4: Simplify right side
    15,928.76x = 192,487,615.98
  5. Step 5: Solve for x
    x = 192,487,615.98/15,928.76
  6. Step 6: Final answer
    x = 12,084.29

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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.