Home / 18,680.68-25,778.28-11,135.53

Finding the Fourth Proportional to 18,680.68, 25,778.28 and 11,135.53

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Solution

The fourth proportional to 18,680.68, 25,778.28 and 11,135.53 is: 15,366.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.68 : 25,778.28 = 11,135.53 : x
  2. Step 2: Convert to fraction form
    18,680.68/25,778.28 = 11,135.53/x
  3. Step 3: Cross multiply
    18,680.68x = 25,778.28 × 11,135.53
  4. Step 4: Simplify right side
    18,680.68x = 287,054,810.29
  5. Step 5: Solve for x
    x = 287,054,810.29/18,680.68
  6. Step 6: Final answer
    x = 15,366.40

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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.