Home / 28,010.94-42,022.89-12,429.78

Finding the Fourth Proportional to 28,010.94, 42,022.89 and 12,429.78

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Solution

The fourth proportional to 28,010.94, 42,022.89 and 12,429.78 is: 18,647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010.94 : 42,022.89 = 12,429.78 : x
  2. Step 2: Convert to fraction form
    28,010.94/42,022.89 = 12,429.78/x
  3. Step 3: Cross multiply
    28,010.94x = 42,022.89 × 12,429.78
  4. Step 4: Simplify right side
    28,010.94x = 522,335,277.66
  5. Step 5: Solve for x
    x = 522,335,277.66/28,010.94
  6. Step 6: Final answer
    x = 18,647.55

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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.