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Finding the Fourth Proportional to 12,483.92, 18,705 and 8,779.53

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Solution

The fourth proportional to 12,483.92, 18,705 and 8,779.53 is: 13,154.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,483.92 : 18,705 = 8,779.53 : x
  2. Step 2: Convert to fraction form
    12,483.92/18,705 = 8,779.53/x
  3. Step 3: Cross multiply
    12,483.92x = 18,705 × 8,779.53
  4. Step 4: Simplify right side
    12,483.92x = 164,221,108.65
  5. Step 5: Solve for x
    x = 164,221,108.65/12,483.92
  6. Step 6: Final answer
    x = 13,154.62

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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.