Home / 20,352.66-28,083.81-11,400.54

Finding the Fourth Proportional to 20,352.66, 28,083.81 and 11,400.54

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Solution

The fourth proportional to 20,352.66, 28,083.81 and 11,400.54 is: 15,731.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.66 : 28,083.81 = 11,400.54 : x
  2. Step 2: Convert to fraction form
    20,352.66/28,083.81 = 11,400.54/x
  3. Step 3: Cross multiply
    20,352.66x = 28,083.81 × 11,400.54
  4. Step 4: Simplify right side
    20,352.66x = 320,170,599.26
  5. Step 5: Solve for x
    x = 320,170,599.26/20,352.66
  6. Step 6: Final answer
    x = 15,731.14

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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.