Home / 31,015.53-42,805.52-30,171.15

Finding the Fourth Proportional to 31,015.53, 42,805.52 and 30,171.15

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Solution

The fourth proportional to 31,015.53, 42,805.52 and 30,171.15 is: 41,640.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,015.53 : 42,805.52 = 30,171.15 : x
  2. Step 2: Convert to fraction form
    31,015.53/42,805.52 = 30,171.15/x
  3. Step 3: Cross multiply
    31,015.53x = 42,805.52 × 30,171.15
  4. Step 4: Simplify right side
    31,015.53x = 1,291,491,764.75
  5. Step 5: Solve for x
    x = 1,291,491,764.75/31,015.53
  6. Step 6: Final answer
    x = 41,640.16

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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.