Home / 15,885-21,921.84-10,305.72

Finding the Fourth Proportional to 15,885, 21,921.84 and 10,305.72

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Solution

The fourth proportional to 15,885, 21,921.84 and 10,305.72 is: 14,222.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,885 : 21,921.84 = 10,305.72 : x
  2. Step 2: Convert to fraction form
    15,885/21,921.84 = 10,305.72/x
  3. Step 3: Cross multiply
    15,885x = 21,921.84 × 10,305.72
  4. Step 4: Simplify right side
    15,885x = 225,920,344.92
  5. Step 5: Solve for x
    x = 225,920,344.92/15,885
  6. Step 6: Final answer
    x = 14,222.24

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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.