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Finding the Fourth Proportional to 22,010.40, 30,358.80 and 13,629.60

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Solution

The fourth proportional to 22,010.40, 30,358.80 and 13,629.60 is: 18,799.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,010.40 : 30,358.80 = 13,629.60 : x
  2. Step 2: Convert to fraction form
    22,010.40/30,358.80 = 13,629.60/x
  3. Step 3: Cross multiply
    22,010.40x = 30,358.80 × 13,629.60
  4. Step 4: Simplify right side
    22,010.40x = 413,778,300.48
  5. Step 5: Solve for x
    x = 413,778,300.48/22,010.40
  6. Step 6: Final answer
    x = 18,799.22

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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.