Home / 31,113.54-42,940.41-19,645.11

Finding the Fourth Proportional to 31,113.54, 42,940.41 and 19,645.11

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Solution

The fourth proportional to 31,113.54, 42,940.41 and 19,645.11 is: 27,112.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,113.54 : 42,940.41 = 19,645.11 : x
  2. Step 2: Convert to fraction form
    31,113.54/42,940.41 = 19,645.11/x
  3. Step 3: Cross multiply
    31,113.54x = 42,940.41 × 19,645.11
  4. Step 4: Simplify right side
    31,113.54x = 843,569,077.90
  5. Step 5: Solve for x
    x = 843,569,077.90/31,113.54
  6. Step 6: Final answer
    x = 27,112.60

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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.