Home / 20,130.09-30,185.43-8,440.17

Finding the Fourth Proportional to 20,130.09, 30,185.43 and 8,440.17

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Solution

The fourth proportional to 20,130.09, 30,185.43 and 8,440.17 is: 12,656.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.09 : 30,185.43 = 8,440.17 : x
  2. Step 2: Convert to fraction form
    20,130.09/30,185.43 = 8,440.17/x
  3. Step 3: Cross multiply
    20,130.09x = 30,185.43 × 8,440.17
  4. Step 4: Simplify right side
    20,130.09x = 254,770,160.72
  5. Step 5: Solve for x
    x = 254,770,160.72/20,130.09
  6. Step 6: Final answer
    x = 12,656.19

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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.