Home / 10,821.80-16,238.10-6,145.40

Finding the Fourth Proportional to 10,821.80, 16,238.10 and 6,145.40

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Solution

The fourth proportional to 10,821.80, 16,238.10 and 6,145.40 is: 9,221.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,821.80 : 16,238.10 = 6,145.40 : x
  2. Step 2: Convert to fraction form
    10,821.80/16,238.10 = 6,145.40/x
  3. Step 3: Cross multiply
    10,821.80x = 16,238.10 × 6,145.40
  4. Step 4: Simplify right side
    10,821.80x = 99,789,619.74
  5. Step 5: Solve for x
    x = 99,789,619.74/10,821.80
  6. Step 6: Final answer
    x = 9,221.17

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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.