Home / 31,107.58-42,951.99-20,512.06

Finding the Fourth Proportional to 31,107.58, 42,951.99 and 20,512.06

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Solution

The fourth proportional to 31,107.58, 42,951.99 and 20,512.06 is: 28,322.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,107.58 : 42,951.99 = 20,512.06 : x
  2. Step 2: Convert to fraction form
    31,107.58/42,951.99 = 20,512.06/x
  3. Step 3: Cross multiply
    31,107.58x = 42,951.99 × 20,512.06
  4. Step 4: Simplify right side
    31,107.58x = 881,033,796.00
  5. Step 5: Solve for x
    x = 881,033,796.00/31,107.58
  6. Step 6: Final answer
    x = 28,322.16

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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.