Home / 21,730.65-29,985.78-12,169.18

Finding the Fourth Proportional to 21,730.65, 29,985.78 and 12,169.18

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Solution

The fourth proportional to 21,730.65, 29,985.78 and 12,169.18 is: 16,792.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.65 : 29,985.78 = 12,169.18 : x
  2. Step 2: Convert to fraction form
    21,730.65/29,985.78 = 12,169.18/x
  3. Step 3: Cross multiply
    21,730.65x = 29,985.78 × 12,169.18
  4. Step 4: Simplify right side
    21,730.65x = 364,902,354.26
  5. Step 5: Solve for x
    x = 364,902,354.26/21,730.65
  6. Step 6: Final answer
    x = 16,792.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.