Home / 20,891.84-31,339.56-7,744.31

Finding the Fourth Proportional to 20,891.84, 31,339.56 and 7,744.31

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Solution

The fourth proportional to 20,891.84, 31,339.56 and 7,744.31 is: 11,617.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.84 : 31,339.56 = 7,744.31 : x
  2. Step 2: Convert to fraction form
    20,891.84/31,339.56 = 7,744.31/x
  3. Step 3: Cross multiply
    20,891.84x = 31,339.56 × 7,744.31
  4. Step 4: Simplify right side
    20,891.84x = 242,703,267.90
  5. Step 5: Solve for x
    x = 242,703,267.90/20,891.84
  6. Step 6: Final answer
    x = 11,617.13

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1.5x scale

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.