Home / 15,821.75-21,836.23-9,107.21

Finding the Fourth Proportional to 15,821.75, 21,836.23 and 9,107.21

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Solution

The fourth proportional to 15,821.75, 21,836.23 and 9,107.21 is: 12,569.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.75 : 21,836.23 = 9,107.21 : x
  2. Step 2: Convert to fraction form
    15,821.75/21,836.23 = 9,107.21/x
  3. Step 3: Cross multiply
    15,821.75x = 21,836.23 × 9,107.21
  4. Step 4: Simplify right side
    15,821.75x = 198,867,164.04
  5. Step 5: Solve for x
    x = 198,867,164.04/15,821.75
  6. Step 6: Final answer
    x = 12,569.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.