Home / 21,100.25-31,661.37-15,304.70

Finding the Fourth Proportional to 21,100.25, 31,661.37 and 15,304.70

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Solution

The fourth proportional to 21,100.25, 31,661.37 and 15,304.70 is: 22,965.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.25 : 31,661.37 = 15,304.70 : x
  2. Step 2: Convert to fraction form
    21,100.25/31,661.37 = 15,304.70/x
  3. Step 3: Cross multiply
    21,100.25x = 31,661.37 × 15,304.70
  4. Step 4: Simplify right side
    21,100.25x = 484,567,611.13
  5. Step 5: Solve for x
    x = 484,567,611.13/21,100.25
  6. Step 6: Final answer
    x = 22,965.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.