Home / 18,998.28-28,506.78-9,145.80

Finding the Fourth Proportional to 18,998.28, 28,506.78 and 9,145.80

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Solution

The fourth proportional to 18,998.28, 28,506.78 and 9,145.80 is: 13,723.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.28 : 28,506.78 = 9,145.80 : x
  2. Step 2: Convert to fraction form
    18,998.28/28,506.78 = 9,145.80/x
  3. Step 3: Cross multiply
    18,998.28x = 28,506.78 × 9,145.80
  4. Step 4: Simplify right side
    18,998.28x = 260,717,308.52
  5. Step 5: Solve for x
    x = 260,717,308.52/18,998.28
  6. Step 6: Final answer
    x = 13,723.21

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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.