Home / 12,587.05-18,872.25-7,040.98

Finding the Fourth Proportional to 12,587.05, 18,872.25 and 7,040.98

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Solution

The fourth proportional to 12,587.05, 18,872.25 and 7,040.98 is: 10,556.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.05 : 18,872.25 = 7,040.98 : x
  2. Step 2: Convert to fraction form
    12,587.05/18,872.25 = 7,040.98/x
  3. Step 3: Cross multiply
    12,587.05x = 18,872.25 × 7,040.98
  4. Step 4: Simplify right side
    12,587.05x = 132,879,134.81
  5. Step 5: Solve for x
    x = 132,879,134.81/12,587.05
  6. Step 6: Final answer
    x = 10,556.81

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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.