Home / 28,629.05-42,960.31-11,987.66

Finding the Fourth Proportional to 28,629.05, 42,960.31 and 11,987.66

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Solution

The fourth proportional to 28,629.05, 42,960.31 and 11,987.66 is: 17,988.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,629.05 : 42,960.31 = 11,987.66 : x
  2. Step 2: Convert to fraction form
    28,629.05/42,960.31 = 11,987.66/x
  3. Step 3: Cross multiply
    28,629.05x = 42,960.31 × 11,987.66
  4. Step 4: Simplify right side
    28,629.05x = 514,993,667.21
  5. Step 5: Solve for x
    x = 514,993,667.21/28,629.05
  6. Step 6: Final answer
    x = 17,988.50

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Similar ratio
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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.