Home / 20,130.10-30,185.42-8,440.18

Finding the Fourth Proportional to 20,130.10, 30,185.42 and 8,440.18

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Solution

The fourth proportional to 20,130.10, 30,185.42 and 8,440.18 is: 12,656.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.10 : 30,185.42 = 8,440.18 : x
  2. Step 2: Convert to fraction form
    20,130.10/30,185.42 = 8,440.18/x
  3. Step 3: Cross multiply
    20,130.10x = 30,185.42 × 8,440.18
  4. Step 4: Simplify right side
    20,130.10x = 254,770,378.18
  5. Step 5: Solve for x
    x = 254,770,378.18/20,130.10
  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.