Home / 15,545.78-21,338.40-13,829.60

Finding the Fourth Proportional to 15,545.78, 21,338.40 and 13,829.60

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Solution

The fourth proportional to 15,545.78, 21,338.40 and 13,829.60 is: 18,982.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,545.78 : 21,338.40 = 13,829.60 : x
  2. Step 2: Convert to fraction form
    15,545.78/21,338.40 = 13,829.60/x
  3. Step 3: Cross multiply
    15,545.78x = 21,338.40 × 13,829.60
  4. Step 4: Simplify right side
    15,545.78x = 295,101,467.49
  5. Step 5: Solve for x
    x = 295,101,467.49/15,545.78
  6. Step 6: Final answer
    x = 18,982.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.