Home / 28,640.31-42,977.19-11,998.92

Finding the Fourth Proportional to 28,640.31, 42,977.19 and 11,998.92

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Solution

The fourth proportional to 28,640.31, 42,977.19 and 11,998.92 is: 18,005.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.31 : 42,977.19 = 11,998.92 : x
  2. Step 2: Convert to fraction form
    28,640.31/42,977.19 = 11,998.92/x
  3. Step 3: Cross multiply
    28,640.31x = 42,977.19 × 11,998.92
  4. Step 4: Simplify right side
    28,640.31x = 515,679,864.63
  5. Step 5: Solve for x
    x = 515,679,864.63/28,640.31
  6. Step 6: Final answer
    x = 18,005.39

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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.