Home / 31,133.93-42,935.82-20,505.11

Finding the Fourth Proportional to 31,133.93, 42,935.82 and 20,505.11

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Solution

The fourth proportional to 31,133.93, 42,935.82 and 20,505.11 is: 28,277.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,133.93 : 42,935.82 = 20,505.11 : x
  2. Step 2: Convert to fraction form
    31,133.93/42,935.82 = 20,505.11/x
  3. Step 3: Cross multiply
    31,133.93x = 42,935.82 × 20,505.11
  4. Step 4: Simplify right side
    31,133.93x = 880,403,712.04
  5. Step 5: Solve for x
    x = 880,403,712.04/31,133.93
  6. Step 6: Final answer
    x = 28,277.95

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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.