Home / 20,331.80-30,490.11-7,001.07

Finding the Fourth Proportional to 20,331.80, 30,490.11 and 7,001.07

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Solution

The fourth proportional to 20,331.80, 30,490.11 and 7,001.07 is: 10,498.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.80 : 30,490.11 = 7,001.07 : x
  2. Step 2: Convert to fraction form
    20,331.80/30,490.11 = 7,001.07/x
  3. Step 3: Cross multiply
    20,331.80x = 30,490.11 × 7,001.07
  4. Step 4: Simplify right side
    20,331.80x = 213,463,394.42
  5. Step 5: Solve for x
    x = 213,463,394.42/20,331.80
  6. Step 6: Final answer
    x = 10,498.99

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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.