Home / 28,087.80-42,131.70-7,311.30

Finding the Fourth Proportional to 28,087.80, 42,131.70 and 7,311.30

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Solution

The fourth proportional to 28,087.80, 42,131.70 and 7,311.30 is: 10,966.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,087.80 : 42,131.70 = 7,311.30 : x
  2. Step 2: Convert to fraction form
    28,087.80/42,131.70 = 7,311.30/x
  3. Step 3: Cross multiply
    28,087.80x = 42,131.70 × 7,311.30
  4. Step 4: Simplify right side
    28,087.80x = 308,037,498.21
  5. Step 5: Solve for x
    x = 308,037,498.21/28,087.80
  6. Step 6: Final answer
    x = 10,966.95

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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.