Home / 20,095.12-27,730.52-11,142.78

Finding the Fourth Proportional to 20,095.12, 27,730.52 and 11,142.78

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Solution

The fourth proportional to 20,095.12, 27,730.52 and 11,142.78 is: 15,376.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,095.12 : 27,730.52 = 11,142.78 : x
  2. Step 2: Convert to fraction form
    20,095.12/27,730.52 = 11,142.78/x
  3. Step 3: Cross multiply
    20,095.12x = 27,730.52 × 11,142.78
  4. Step 4: Simplify right side
    20,095.12x = 308,995,083.65
  5. Step 5: Solve for x
    x = 308,995,083.65/20,095.12
  6. Step 6: Final answer
    x = 15,376.62

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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.