Home / 7,813.56-11,721.25-3,135.20

Finding the Fourth Proportional to 7,813.56, 11,721.25 and 3,135.20

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Solution

The fourth proportional to 7,813.56, 11,721.25 and 3,135.20 is: 4,703.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,813.56 : 11,721.25 = 3,135.20 : x
  2. Step 2: Convert to fraction form
    7,813.56/11,721.25 = 3,135.20/x
  3. Step 3: Cross multiply
    7,813.56x = 11,721.25 × 3,135.20
  4. Step 4: Simplify right side
    7,813.56x = 36,748,455.16
  5. Step 5: Solve for x
    x = 36,748,455.16/7,813.56
  6. Step 6: Final answer
    x = 4,703.17

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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.