Home / 30,974.60-42,741.27-18,231.68

Finding the Fourth Proportional to 30,974.60, 42,741.27 and 18,231.68

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Solution

The fourth proportional to 30,974.60, 42,741.27 and 18,231.68 is: 25,157.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,974.60 : 42,741.27 = 18,231.68 : x
  2. Step 2: Convert to fraction form
    30,974.60/42,741.27 = 18,231.68/x
  3. Step 3: Cross multiply
    30,974.60x = 42,741.27 × 18,231.68
  4. Step 4: Simplify right side
    30,974.60x = 779,245,264.29
  5. Step 5: Solve for x
    x = 779,245,264.29/30,974.60
  6. Step 6: Final answer
    x = 25,157.55

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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.