Home / 20,128.13-30,173.72-6,971.30

Finding the Fourth Proportional to 20,128.13, 30,173.72 and 6,971.30

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Solution

The fourth proportional to 20,128.13, 30,173.72 and 6,971.30 is: 10,450.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.13 : 30,173.72 = 6,971.30 : x
  2. Step 2: Convert to fraction form
    20,128.13/30,173.72 = 6,971.30/x
  3. Step 3: Cross multiply
    20,128.13x = 30,173.72 × 6,971.30
  4. Step 4: Simplify right side
    20,128.13x = 210,349,981.66
  5. Step 5: Solve for x
    x = 210,349,981.66/20,128.13
  6. Step 6: Final answer
    x = 10,450.55

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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.