Home / 15,161.04-20,898-10,115.28

Finding the Fourth Proportional to 15,161.04, 20,898 and 10,115.28

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Solution

The fourth proportional to 15,161.04, 20,898 and 10,115.28 is: 13,942.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,161.04 : 20,898 = 10,115.28 : x
  2. Step 2: Convert to fraction form
    15,161.04/20,898 = 10,115.28/x
  3. Step 3: Cross multiply
    15,161.04x = 20,898 × 10,115.28
  4. Step 4: Simplify right side
    15,161.04x = 211,389,121.44
  5. Step 5: Solve for x
    x = 211,389,121.44/15,161.04
  6. Step 6: Final answer
    x = 13,942.92

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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.