Home / 21,868.25-30,169.87-13,363.55

Finding the Fourth Proportional to 21,868.25, 30,169.87 and 13,363.55

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Solution

The fourth proportional to 21,868.25, 30,169.87 and 13,363.55 is: 18,436.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.25 : 30,169.87 = 13,363.55 : x
  2. Step 2: Convert to fraction form
    21,868.25/30,169.87 = 13,363.55/x
  3. Step 3: Cross multiply
    21,868.25x = 30,169.87 × 13,363.55
  4. Step 4: Simplify right side
    21,868.25x = 403,176,495.12
  5. Step 5: Solve for x
    x = 403,176,495.12/21,868.25
  6. Step 6: Final answer
    x = 18,436.62

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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.