Home / 20,552.74-28,362.78-11,121.30

Finding the Fourth Proportional to 20,552.74, 28,362.78 and 11,121.30

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Solution

The fourth proportional to 20,552.74, 28,362.78 and 11,121.30 is: 15,347.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,552.74 : 28,362.78 = 11,121.30 : x
  2. Step 2: Convert to fraction form
    20,552.74/28,362.78 = 11,121.30/x
  3. Step 3: Cross multiply
    20,552.74x = 28,362.78 × 11,121.30
  4. Step 4: Simplify right side
    20,552.74x = 315,430,985.21
  5. Step 5: Solve for x
    x = 315,430,985.21/20,552.74
  6. Step 6: Final answer
    x = 15,347.39

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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.