Home / 20,291.54-30,439.75-7,808.66

Finding the Fourth Proportional to 20,291.54, 30,439.75 and 7,808.66

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Solution

The fourth proportional to 20,291.54, 30,439.75 and 7,808.66 is: 11,713.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.54 : 30,439.75 = 7,808.66 : x
  2. Step 2: Convert to fraction form
    20,291.54/30,439.75 = 7,808.66/x
  3. Step 3: Cross multiply
    20,291.54x = 30,439.75 × 7,808.66
  4. Step 4: Simplify right side
    20,291.54x = 237,693,658.24
  5. Step 5: Solve for x
    x = 237,693,658.24/20,291.54
  6. Step 6: Final answer
    x = 11,713.93

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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.