Home / 20,473.07-30,691.34-7,990.19

Finding the Fourth Proportional to 20,473.07, 30,691.34 and 7,990.19

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Solution

The fourth proportional to 20,473.07, 30,691.34 and 7,990.19 is: 11,978.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,473.07 : 30,691.34 = 7,990.19 : x
  2. Step 2: Convert to fraction form
    20,473.07/30,691.34 = 7,990.19/x
  3. Step 3: Cross multiply
    20,473.07x = 30,691.34 × 7,990.19
  4. Step 4: Simplify right side
    20,473.07x = 245,229,637.95
  5. Step 5: Solve for x
    x = 245,229,637.95/20,473.07
  6. Step 6: Final answer
    x = 11,978.16

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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.