Home / 15,161.54-20,898.69-10,115.78

Finding the Fourth Proportional to 15,161.54, 20,898.69 and 10,115.78

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Solution

The fourth proportional to 15,161.54, 20,898.69 and 10,115.78 is: 13,943.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,161.54 : 20,898.69 = 10,115.78 : x
  2. Step 2: Convert to fraction form
    15,161.54/20,898.69 = 10,115.78/x
  3. Step 3: Cross multiply
    15,161.54x = 20,898.69 × 10,115.78
  4. Step 4: Simplify right side
    15,161.54x = 211,406,550.33
  5. Step 5: Solve for x
    x = 211,406,550.33/15,161.54
  6. Step 6: Final answer
    x = 13,943.61

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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.