Home / 18,721.85-28,024.05-10,276.79

Finding the Fourth Proportional to 18,721.85, 28,024.05 and 10,276.79

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Solution

The fourth proportional to 18,721.85, 28,024.05 and 10,276.79 is: 15,382.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.85 : 28,024.05 = 10,276.79 : x
  2. Step 2: Convert to fraction form
    18,721.85/28,024.05 = 10,276.79/x
  3. Step 3: Cross multiply
    18,721.85x = 28,024.05 × 10,276.79
  4. Step 4: Simplify right side
    18,721.85x = 287,997,276.80
  5. Step 5: Solve for x
    x = 287,997,276.80/18,721.85
  6. Step 6: Final answer
    x = 15,382.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.