Home / 20,065.90-30,117.35-10,212.25

Finding the Fourth Proportional to 20,065.90, 30,117.35 and 10,212.25

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Solution

The fourth proportional to 20,065.90, 30,117.35 and 10,212.25 is: 15,327.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,065.90 : 30,117.35 = 10,212.25 : x
  2. Step 2: Convert to fraction form
    20,065.90/30,117.35 = 10,212.25/x
  3. Step 3: Cross multiply
    20,065.90x = 30,117.35 × 10,212.25
  4. Step 4: Simplify right side
    20,065.90x = 307,565,907.54
  5. Step 5: Solve for x
    x = 307,565,907.54/20,065.90
  6. Step 6: Final answer
    x = 15,327.79

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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.