Home / 22,786.13-31,439.81-13,220.47

Finding the Fourth Proportional to 22,786.13, 31,439.81 and 13,220.47

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Solution

The fourth proportional to 22,786.13, 31,439.81 and 13,220.47 is: 18,241.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,786.13 : 31,439.81 = 13,220.47 : x
  2. Step 2: Convert to fraction form
    22,786.13/31,439.81 = 13,220.47/x
  3. Step 3: Cross multiply
    22,786.13x = 31,439.81 × 13,220.47
  4. Step 4: Simplify right side
    22,786.13x = 415,649,064.91
  5. Step 5: Solve for x
    x = 415,649,064.91/22,786.13
  6. Step 6: Final answer
    x = 18,241.32

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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.