Home / 31,129.08-42,965.88-19,202.20

Finding the Fourth Proportional to 31,129.08, 42,965.88 and 19,202.20

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Solution

The fourth proportional to 31,129.08, 42,965.88 and 19,202.20 is: 26,503.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,129.08 : 42,965.88 = 19,202.20 : x
  2. Step 2: Convert to fraction form
    31,129.08/42,965.88 = 19,202.20/x
  3. Step 3: Cross multiply
    31,129.08x = 42,965.88 × 19,202.20
  4. Step 4: Simplify right side
    31,129.08x = 825,039,420.94
  5. Step 5: Solve for x
    x = 825,039,420.94/31,129.08
  6. Step 6: Final answer
    x = 26,503.82

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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.