Home / 28,115.70-42,173.55-7,339.20

Finding the Fourth Proportional to 28,115.70, 42,173.55 and 7,339.20

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Solution

The fourth proportional to 28,115.70, 42,173.55 and 7,339.20 is: 11,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.70 : 42,173.55 = 7,339.20 : x
  2. Step 2: Convert to fraction form
    28,115.70/42,173.55 = 7,339.20/x
  3. Step 3: Cross multiply
    28,115.70x = 42,173.55 × 7,339.20
  4. Step 4: Simplify right side
    28,115.70x = 309,520,118.16
  5. Step 5: Solve for x
    x = 309,520,118.16/28,115.70
  6. Step 6: Final answer
    x = 11,008.80

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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.