Home / 31,113.56-42,940.40-19,645.13

Finding the Fourth Proportional to 31,113.56, 42,940.40 and 19,645.13

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Solution

The fourth proportional to 31,113.56, 42,940.40 and 19,645.13 is: 27,112.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,113.56 : 42,940.40 = 19,645.13 : x
  2. Step 2: Convert to fraction form
    31,113.56/42,940.40 = 19,645.13/x
  3. Step 3: Cross multiply
    31,113.56x = 42,940.40 × 19,645.13
  4. Step 4: Simplify right side
    31,113.56x = 843,569,427.32
  5. Step 5: Solve for x
    x = 843,569,427.32/31,113.56
  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.