Home / 20,170.69-30,255.33-7,690.25

Finding the Fourth Proportional to 20,170.69, 30,255.33 and 7,690.25

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Solution

The fourth proportional to 20,170.69, 30,255.33 and 7,690.25 is: 11,535.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,170.69 : 30,255.33 = 7,690.25 : x
  2. Step 2: Convert to fraction form
    20,170.69/30,255.33 = 7,690.25/x
  3. Step 3: Cross multiply
    20,170.69x = 30,255.33 × 7,690.25
  4. Step 4: Simplify right side
    20,170.69x = 232,671,051.53
  5. Step 5: Solve for x
    x = 232,671,051.53/20,170.69
  6. Step 6: Final answer
    x = 11,535.11

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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.