Home / 28,620.99-42,939.18-11,972.25

Finding the Fourth Proportional to 28,620.99, 42,939.18 and 11,972.25

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Solution

The fourth proportional to 28,620.99, 42,939.18 and 11,972.25 is: 17,961.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620.99 : 42,939.18 = 11,972.25 : x
  2. Step 2: Convert to fraction form
    28,620.99/42,939.18 = 11,972.25/x
  3. Step 3: Cross multiply
    28,620.99x = 42,939.18 × 11,972.25
  4. Step 4: Simplify right side
    28,620.99x = 514,078,597.76
  5. Step 5: Solve for x
    x = 514,078,597.76/28,620.99
  6. Step 6: Final answer
    x = 17,961.59

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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.