Home / 20,061.90-30,111.35-10,208.25

Finding the Fourth Proportional to 20,061.90, 30,111.35 and 10,208.25

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Solution

The fourth proportional to 20,061.90, 30,111.35 and 10,208.25 is: 15,321.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,061.90 : 30,111.35 = 10,208.25 : x
  2. Step 2: Convert to fraction form
    20,061.90/30,111.35 = 10,208.25/x
  3. Step 3: Cross multiply
    20,061.90x = 30,111.35 × 10,208.25
  4. Step 4: Simplify right side
    20,061.90x = 307,384,137.60
  5. Step 5: Solve for x
    x = 307,384,137.60/20,061.90
  6. Step 6: Final answer
    x = 15,321.79

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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.