Home / 19,875.12-29,826.38-8,188.36

Finding the Fourth Proportional to 19,875.12, 29,826.38 and 8,188.36

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Solution

The fourth proportional to 19,875.12, 29,826.38 and 8,188.36 is: 12,288.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,875.12 : 29,826.38 = 8,188.36 : x
  2. Step 2: Convert to fraction form
    19,875.12/29,826.38 = 8,188.36/x
  3. Step 3: Cross multiply
    19,875.12x = 29,826.38 × 8,188.36
  4. Step 4: Simplify right side
    19,875.12x = 244,229,136.94
  5. Step 5: Solve for x
    x = 244,229,136.94/19,875.12
  6. Step 6: Final answer
    x = 12,288.18

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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.