Home / 12,581.78-18,870.54-3,814.58

Finding the Fourth Proportional to 12,581.78, 18,870.54 and 3,814.58

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Solution

The fourth proportional to 12,581.78, 18,870.54 and 3,814.58 is: 5,721.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.78 : 18,870.54 = 3,814.58 : x
  2. Step 2: Convert to fraction form
    12,581.78/18,870.54 = 3,814.58/x
  3. Step 3: Cross multiply
    12,581.78x = 18,870.54 × 3,814.58
  4. Step 4: Simplify right side
    12,581.78x = 71,983,184.47
  5. Step 5: Solve for x
    x = 71,983,184.47/12,581.78
  6. Step 6: Final answer
    x = 5,721.22

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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.