Home / 39,778.24-54,902.80-31,147.26

Finding the Fourth Proportional to 39,778.24, 54,902.80 and 31,147.26

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Solution

The fourth proportional to 39,778.24, 54,902.80 and 31,147.26 is: 42,990.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,778.24 : 54,902.80 = 31,147.26 : x
  2. Step 2: Convert to fraction form
    39,778.24/54,902.80 = 31,147.26/x
  3. Step 3: Cross multiply
    39,778.24x = 54,902.80 × 31,147.26
  4. Step 4: Simplify right side
    39,778.24x = 1,710,071,786.33
  5. Step 5: Solve for x
    x = 1,710,071,786.33/39,778.24
  6. Step 6: Final answer
    x = 42,990.13

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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.