Home / 20,741.80-31,116.70-8,895.40

Finding the Fourth Proportional to 20,741.80, 31,116.70 and 8,895.40

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Solution

The fourth proportional to 20,741.80, 31,116.70 and 8,895.40 is: 13,344.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.80 : 31,116.70 = 8,895.40 : x
  2. Step 2: Convert to fraction form
    20,741.80/31,116.70 = 8,895.40/x
  3. Step 3: Cross multiply
    20,741.80x = 31,116.70 × 8,895.40
  4. Step 4: Simplify right side
    20,741.80x = 276,795,493.18
  5. Step 5: Solve for x
    x = 276,795,493.18/20,741.80
  6. Step 6: Final answer
    x = 13,344.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.