Home / 21,219.75-31,834.19-6,429.82

Finding the Fourth Proportional to 21,219.75, 31,834.19 and 6,429.82

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Solution

The fourth proportional to 21,219.75, 31,834.19 and 6,429.82 is: 9,646.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.75 : 31,834.19 = 6,429.82 : x
  2. Step 2: Convert to fraction form
    21,219.75/31,834.19 = 6,429.82/x
  3. Step 3: Cross multiply
    21,219.75x = 31,834.19 × 6,429.82
  4. Step 4: Simplify right side
    21,219.75x = 204,688,111.55
  5. Step 5: Solve for x
    x = 204,688,111.55/21,219.75
  6. Step 6: Final answer
    x = 9,646.11

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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.