Home / 19,786.90-29,688.18-8,685.85

Finding the Fourth Proportional to 19,786.90, 29,688.18 and 8,685.85

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Solution

The fourth proportional to 19,786.90, 29,688.18 and 8,685.85 is: 13,032.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,786.90 : 29,688.18 = 8,685.85 : x
  2. Step 2: Convert to fraction form
    19,786.90/29,688.18 = 8,685.85/x
  3. Step 3: Cross multiply
    19,786.90x = 29,688.18 × 8,685.85
  4. Step 4: Simplify right side
    19,786.90x = 257,867,078.25
  5. Step 5: Solve for x
    x = 257,867,078.25/19,786.90
  6. Step 6: Final answer
    x = 13,032.21

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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.