Home / 28,165.20-42,247.80-7,390.80

Finding the Fourth Proportional to 28,165.20, 42,247.80 and 7,390.80

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Solution

The fourth proportional to 28,165.20, 42,247.80 and 7,390.80 is: 11,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,165.20 : 42,247.80 = 7,390.80 : x
  2. Step 2: Convert to fraction form
    28,165.20/42,247.80 = 7,390.80/x
  3. Step 3: Cross multiply
    28,165.20x = 42,247.80 × 7,390.80
  4. Step 4: Simplify right side
    28,165.20x = 312,245,040.24
  5. Step 5: Solve for x
    x = 312,245,040.24/28,165.20
  6. Step 6: Final answer
    x = 11,086.20

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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.