Home / 21,888.37-30,163.81-15,910.57

Finding the Fourth Proportional to 21,888.37, 30,163.81 and 15,910.57

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Solution

The fourth proportional to 21,888.37, 30,163.81 and 15,910.57 is: 21,925.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.37 : 30,163.81 = 15,910.57 : x
  2. Step 2: Convert to fraction form
    21,888.37/30,163.81 = 15,910.57/x
  3. Step 3: Cross multiply
    21,888.37x = 30,163.81 × 15,910.57
  4. Step 4: Simplify right side
    21,888.37x = 479,923,180.10
  5. Step 5: Solve for x
    x = 479,923,180.10/21,888.37
  6. Step 6: Final answer
    x = 21,925.95

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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.