Home / 12,860.78-19,291.13-4,095.66

Finding the Fourth Proportional to 12,860.78, 19,291.13 and 4,095.66

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Solution

The fourth proportional to 12,860.78, 19,291.13 and 4,095.66 is: 6,143.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,860.78 : 19,291.13 = 4,095.66 : x
  2. Step 2: Convert to fraction form
    12,860.78/19,291.13 = 4,095.66/x
  3. Step 3: Cross multiply
    12,860.78x = 19,291.13 × 4,095.66
  4. Step 4: Simplify right side
    12,860.78x = 79,009,976.72
  5. Step 5: Solve for x
    x = 79,009,976.72/12,860.78
  6. Step 6: Final answer
    x = 6,143.48

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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.