Home / 28,276.80-42,415.20-11,625.90

Finding the Fourth Proportional to 28,276.80, 42,415.20 and 11,625.90

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Solution

The fourth proportional to 28,276.80, 42,415.20 and 11,625.90 is: 17,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,276.80 : 42,415.20 = 11,625.90 : x
  2. Step 2: Convert to fraction form
    28,276.80/42,415.20 = 11,625.90/x
  3. Step 3: Cross multiply
    28,276.80x = 42,415.20 × 11,625.90
  4. Step 4: Simplify right side
    28,276.80x = 493,114,873.68
  5. Step 5: Solve for x
    x = 493,114,873.68/28,276.80
  6. Step 6: Final answer
    x = 17,438.85

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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.