Home / 28,420.36-39,220.14-15,844.84

Finding the Fourth Proportional to 28,420.36, 39,220.14 and 15,844.84

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Solution

The fourth proportional to 28,420.36, 39,220.14 and 15,844.84 is: 21,865.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.36 : 39,220.14 = 15,844.84 : x
  2. Step 2: Convert to fraction form
    28,420.36/39,220.14 = 15,844.84/x
  3. Step 3: Cross multiply
    28,420.36x = 39,220.14 × 15,844.84
  4. Step 4: Simplify right side
    28,420.36x = 621,436,843.08
  5. Step 5: Solve for x
    x = 621,436,843.08/28,420.36
  6. Step 6: Final answer
    x = 21,865.90

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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.