Home / 20,387.79-30,555.90-11,627.64

Finding the Fourth Proportional to 20,387.79, 30,555.90 and 11,627.64

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Solution

The fourth proportional to 20,387.79, 30,555.90 and 11,627.64 is: 17,426.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.79 : 30,555.90 = 11,627.64 : x
  2. Step 2: Convert to fraction form
    20,387.79/30,555.90 = 11,627.64/x
  3. Step 3: Cross multiply
    20,387.79x = 30,555.90 × 11,627.64
  4. Step 4: Simplify right side
    20,387.79x = 355,293,005.08
  5. Step 5: Solve for x
    x = 355,293,005.08/20,387.79
  6. Step 6: Final answer
    x = 17,426.75

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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.