Home / 22,221.06-30,668.40-12,787.80

Finding the Fourth Proportional to 22,221.06, 30,668.40 and 12,787.80

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Solution

The fourth proportional to 22,221.06, 30,668.40 and 12,787.80 is: 17,649.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,221.06 : 30,668.40 = 12,787.80 : x
  2. Step 2: Convert to fraction form
    22,221.06/30,668.40 = 12,787.80/x
  3. Step 3: Cross multiply
    22,221.06x = 30,668.40 × 12,787.80
  4. Step 4: Simplify right side
    22,221.06x = 392,181,365.52
  5. Step 5: Solve for x
    x = 392,181,365.52/22,221.06
  6. Step 6: Final answer
    x = 17,649.08

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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.