Home / 15,753.67-21,740.57-8,680.35

Finding the Fourth Proportional to 15,753.67, 21,740.57 and 8,680.35

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Solution

The fourth proportional to 15,753.67, 21,740.57 and 8,680.35 is: 11,979.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.67 : 21,740.57 = 8,680.35 : x
  2. Step 2: Convert to fraction form
    15,753.67/21,740.57 = 8,680.35/x
  3. Step 3: Cross multiply
    15,753.67x = 21,740.57 × 8,680.35
  4. Step 4: Simplify right side
    15,753.67x = 188,715,756.80
  5. Step 5: Solve for x
    x = 188,715,756.80/15,753.67
  6. Step 6: Final answer
    x = 11,979.16

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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.