Home / 20,128.09-30,182.43-8,438.17

Finding the Fourth Proportional to 20,128.09, 30,182.43 and 8,438.17

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Solution

The fourth proportional to 20,128.09, 30,182.43 and 8,438.17 is: 12,653.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.09 : 30,182.43 = 8,438.17 : x
  2. Step 2: Convert to fraction form
    20,128.09/30,182.43 = 8,438.17/x
  3. Step 3: Cross multiply
    20,128.09x = 30,182.43 × 8,438.17
  4. Step 4: Simplify right side
    20,128.09x = 254,684,475.35
  5. Step 5: Solve for x
    x = 254,684,475.35/20,128.09
  6. Step 6: Final answer
    x = 12,653.19

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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.