Home / 18,875.52-28,317.44-7,188.80

Finding the Fourth Proportional to 18,875.52, 28,317.44 and 7,188.80

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Solution

The fourth proportional to 18,875.52, 28,317.44 and 7,188.80 is: 10,784.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.52 : 28,317.44 = 7,188.80 : x
  2. Step 2: Convert to fraction form
    18,875.52/28,317.44 = 7,188.80/x
  3. Step 3: Cross multiply
    18,875.52x = 28,317.44 × 7,188.80
  4. Step 4: Simplify right side
    18,875.52x = 203,568,412.67
  5. Step 5: Solve for x
    x = 203,568,412.67/18,875.52
  6. Step 6: Final answer
    x = 10,784.78

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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.