Home / 15,921.15-21,964.84-9,205.53

Finding the Fourth Proportional to 15,921.15, 21,964.84 and 9,205.53

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Solution

The fourth proportional to 15,921.15, 21,964.84 and 9,205.53 is: 12,699.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.15 : 21,964.84 = 9,205.53 : x
  2. Step 2: Convert to fraction form
    15,921.15/21,964.84 = 9,205.53/x
  3. Step 3: Cross multiply
    15,921.15x = 21,964.84 × 9,205.53
  4. Step 4: Simplify right side
    15,921.15x = 202,197,993.57
  5. Step 5: Solve for x
    x = 202,197,993.57/15,921.15
  6. Step 6: Final answer
    x = 12,699.96

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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.