Home / 31,110.99-42,939.87-18,359.43

Finding the Fourth Proportional to 31,110.99, 42,939.87 and 18,359.43

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Solution

The fourth proportional to 31,110.99, 42,939.87 and 18,359.43 is: 25,339.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,110.99 : 42,939.87 = 18,359.43 : x
  2. Step 2: Convert to fraction form
    31,110.99/42,939.87 = 18,359.43/x
  3. Step 3: Cross multiply
    31,110.99x = 42,939.87 × 18,359.43
  4. Step 4: Simplify right side
    31,110.99x = 788,351,537.47
  5. Step 5: Solve for x
    x = 788,351,537.47/31,110.99
  6. Step 6: Final answer
    x = 25,339.97

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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.