Home / 28,479.88-42,758.70-18,137.80

Finding the Fourth Proportional to 28,479.88, 42,758.70 and 18,137.80

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Solution

The fourth proportional to 28,479.88, 42,758.70 and 18,137.80 is: 27,231.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.88 : 42,758.70 = 18,137.80 : x
  2. Step 2: Convert to fraction form
    28,479.88/42,758.70 = 18,137.80/x
  3. Step 3: Cross multiply
    28,479.88x = 42,758.70 × 18,137.80
  4. Step 4: Simplify right side
    28,479.88x = 775,548,748.86
  5. Step 5: Solve for x
    x = 775,548,748.86/28,479.88
  6. Step 6: Final answer
    x = 27,231.46

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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.