Home / 31,115.63-42,942.80-19,178.66

Finding the Fourth Proportional to 31,115.63, 42,942.80 and 19,178.66

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Solution

The fourth proportional to 31,115.63, 42,942.80 and 19,178.66 is: 26,468.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.63 : 42,942.80 = 19,178.66 : x
  2. Step 2: Convert to fraction form
    31,115.63/42,942.80 = 19,178.66/x
  3. Step 3: Cross multiply
    31,115.63x = 42,942.80 × 19,178.66
  4. Step 4: Simplify right side
    31,115.63x = 823,585,360.65
  5. Step 5: Solve for x
    x = 823,585,360.65/31,115.63
  6. Step 6: Final answer
    x = 26,468.54

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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.