Home / 20,119.19-30,178.79-6,971.57

Finding the Fourth Proportional to 20,119.19, 30,178.79 and 6,971.57

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Solution

The fourth proportional to 20,119.19, 30,178.79 and 6,971.57 is: 10,457.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,119.19 : 30,178.79 = 6,971.57 : x
  2. Step 2: Convert to fraction form
    20,119.19/30,178.79 = 6,971.57/x
  3. Step 3: Cross multiply
    20,119.19x = 30,178.79 × 6,971.57
  4. Step 4: Simplify right side
    20,119.19x = 210,393,361.25
  5. Step 5: Solve for x
    x = 210,393,361.25/20,119.19
  6. Step 6: Final answer
    x = 10,457.35

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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.