Home / 15,154.36-20,913.96-10,115.36

Finding the Fourth Proportional to 15,154.36, 20,913.96 and 10,115.36

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Solution

The fourth proportional to 15,154.36, 20,913.96 and 10,115.36 is: 13,959.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.36 : 20,913.96 = 10,115.36 : x
  2. Step 2: Convert to fraction form
    15,154.36/20,913.96 = 10,115.36/x
  3. Step 3: Cross multiply
    15,154.36x = 20,913.96 × 10,115.36
  4. Step 4: Simplify right side
    15,154.36x = 211,552,234.43
  5. Step 5: Solve for x
    x = 211,552,234.43/15,154.36
  6. Step 6: Final answer
    x = 13,959.83

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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.