Home / 15,169.32-20,916.18-11,399.40

Finding the Fourth Proportional to 15,169.32, 20,916.18 and 11,399.40

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Solution

The fourth proportional to 15,169.32, 20,916.18 and 11,399.40 is: 15,718.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,169.32 : 20,916.18 = 11,399.40 : x
  2. Step 2: Convert to fraction form
    15,169.32/20,916.18 = 11,399.40/x
  3. Step 3: Cross multiply
    15,169.32x = 20,916.18 × 11,399.40
  4. Step 4: Simplify right side
    15,169.32x = 238,431,902.29
  5. Step 5: Solve for x
    x = 238,431,902.29/15,169.32
  6. Step 6: Final answer
    x = 15,718.03

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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.