Home / 31,111.22-42,940.44-19,778.51

Finding the Fourth Proportional to 31,111.22, 42,940.44 and 19,778.51

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Solution

The fourth proportional to 31,111.22, 42,940.44 and 19,778.51 is: 27,298.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,111.22 : 42,940.44 = 19,778.51 : x
  2. Step 2: Convert to fraction form
    31,111.22/42,940.44 = 19,778.51/x
  3. Step 3: Cross multiply
    31,111.22x = 42,940.44 × 19,778.51
  4. Step 4: Simplify right side
    31,111.22x = 849,297,707.24
  5. Step 5: Solve for x
    x = 849,297,707.24/31,111.22
  6. Step 6: Final answer
    x = 27,298.76

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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.