Home / 20,489.34-30,700.62-7,995.18

Finding the Fourth Proportional to 20,489.34, 30,700.62 and 7,995.18

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Solution

The fourth proportional to 20,489.34, 30,700.62 and 7,995.18 is: 11,979.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.34 : 30,700.62 = 7,995.18 : x
  2. Step 2: Convert to fraction form
    20,489.34/30,700.62 = 7,995.18/x
  3. Step 3: Cross multiply
    20,489.34x = 30,700.62 × 7,995.18
  4. Step 4: Simplify right side
    20,489.34x = 245,456,983.01
  5. Step 5: Solve for x
    x = 245,456,983.01/20,489.34
  6. Step 6: Final answer
    x = 11,979.74

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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.