Home / 28,338.78-39,119.04-18,267.78

Finding the Fourth Proportional to 28,338.78, 39,119.04 and 18,267.78

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Solution

The fourth proportional to 28,338.78, 39,119.04 and 18,267.78 is: 25,216.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,338.78 : 39,119.04 = 18,267.78 : x
  2. Step 2: Convert to fraction form
    28,338.78/39,119.04 = 18,267.78/x
  3. Step 3: Cross multiply
    28,338.78x = 39,119.04 × 18,267.78
  4. Step 4: Simplify right side
    28,338.78x = 714,618,016.53
  5. Step 5: Solve for x
    x = 714,618,016.53/28,338.78
  6. Step 6: Final answer
    x = 25,216.96

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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.