Home / 15,753.96-21,740.45-8,680.50

Finding the Fourth Proportional to 15,753.96, 21,740.45 and 8,680.50

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Solution

The fourth proportional to 15,753.96, 21,740.45 and 8,680.50 is: 11,979.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.96 : 21,740.45 = 8,680.50 : x
  2. Step 2: Convert to fraction form
    15,753.96/21,740.45 = 8,680.50/x
  3. Step 3: Cross multiply
    15,753.96x = 21,740.45 × 8,680.50
  4. Step 4: Simplify right side
    15,753.96x = 188,717,932.82
  5. Step 5: Solve for x
    x = 188,717,932.82/15,753.96
  6. Step 6: Final answer
    x = 11,979.08

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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.