Home / 20,868.84-31,298.40-9,764.96

Finding the Fourth Proportional to 20,868.84, 31,298.40 and 9,764.96

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Solution

The fourth proportional to 20,868.84, 31,298.40 and 9,764.96 is: 14,645.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.84 : 31,298.40 = 9,764.96 : x
  2. Step 2: Convert to fraction form
    20,868.84/31,298.40 = 9,764.96/x
  3. Step 3: Cross multiply
    20,868.84x = 31,298.40 × 9,764.96
  4. Step 4: Simplify right side
    20,868.84x = 305,627,467.57
  5. Step 5: Solve for x
    x = 305,627,467.57/20,868.84
  6. Step 6: Final answer
    x = 14,645.16

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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.