Home / 12,857.11-19,242.90-11,315.66

Finding the Fourth Proportional to 12,857.11, 19,242.90 and 11,315.66

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Solution

The fourth proportional to 12,857.11, 19,242.90 and 11,315.66 is: 16,935.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.11 : 19,242.90 = 11,315.66 : x
  2. Step 2: Convert to fraction form
    12,857.11/19,242.90 = 11,315.66/x
  3. Step 3: Cross multiply
    12,857.11x = 19,242.90 × 11,315.66
  4. Step 4: Simplify right side
    12,857.11x = 217,746,017.60
  5. Step 5: Solve for x
    x = 217,746,017.60/12,857.11
  6. Step 6: Final answer
    x = 16,935.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.