Home / 15,127.89-20,857.68-11,934.87

Finding the Fourth Proportional to 15,127.89, 20,857.68 and 11,934.87

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Solution

The fourth proportional to 15,127.89, 20,857.68 and 11,934.87 is: 16,455.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,127.89 : 20,857.68 = 11,934.87 : x
  2. Step 2: Convert to fraction form
    15,127.89/20,857.68 = 11,934.87/x
  3. Step 3: Cross multiply
    15,127.89x = 20,857.68 × 11,934.87
  4. Step 4: Simplify right side
    15,127.89x = 248,933,699.30
  5. Step 5: Solve for x
    x = 248,933,699.30/15,127.89
  6. Step 6: Final answer
    x = 16,455.28

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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.