Home / 20,128.04-30,182.31-8,438.12

Finding the Fourth Proportional to 20,128.04, 30,182.31 and 8,438.12

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Solution

The fourth proportional to 20,128.04, 30,182.31 and 8,438.12 is: 12,653.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.04 : 30,182.31 = 8,438.12 : x
  2. Step 2: Convert to fraction form
    20,128.04/30,182.31 = 8,438.12/x
  3. Step 3: Cross multiply
    20,128.04x = 30,182.31 × 8,438.12
  4. Step 4: Simplify right side
    20,128.04x = 254,681,802.75
  5. Step 5: Solve for x
    x = 254,681,802.75/20,128.04
  6. Step 6: Final answer
    x = 12,653.09

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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.