Home / 15,822.80-21,826.12-9,855.44

Finding the Fourth Proportional to 15,822.80, 21,826.12 and 9,855.44

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Solution

The fourth proportional to 15,822.80, 21,826.12 and 9,855.44 is: 13,594.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,822.80 : 21,826.12 = 9,855.44 : x
  2. Step 2: Convert to fraction form
    15,822.80/21,826.12 = 9,855.44/x
  3. Step 3: Cross multiply
    15,822.80x = 21,826.12 × 9,855.44
  4. Step 4: Simplify right side
    15,822.80x = 215,106,016.09
  5. Step 5: Solve for x
    x = 215,106,016.09/15,822.80
  6. Step 6: Final answer
    x = 13,594.69

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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.