Home / 12,688.11-19,031.73-3,328.05

Finding the Fourth Proportional to 12,688.11, 19,031.73 and 3,328.05

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Solution

The fourth proportional to 12,688.11, 19,031.73 and 3,328.05 is: 4,991.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.11 : 19,031.73 = 3,328.05 : x
  2. Step 2: Convert to fraction form
    12,688.11/19,031.73 = 3,328.05/x
  3. Step 3: Cross multiply
    12,688.11x = 19,031.73 × 3,328.05
  4. Step 4: Simplify right side
    12,688.11x = 63,338,607.92
  5. Step 5: Solve for x
    x = 63,338,607.92/12,688.11
  6. Step 6: Final answer
    x = 4,991.97

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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.