Home / 21,730.68-29,986.88-12,168.90

Finding the Fourth Proportional to 21,730.68, 29,986.88 and 12,168.90

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Solution

The fourth proportional to 21,730.68, 29,986.88 and 12,168.90 is: 16,792.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.68 : 29,986.88 = 12,168.90 : x
  2. Step 2: Convert to fraction form
    21,730.68/29,986.88 = 12,168.90/x
  3. Step 3: Cross multiply
    21,730.68x = 29,986.88 × 12,168.90
  4. Step 4: Simplify right side
    21,730.68x = 364,907,283.19
  5. Step 5: Solve for x
    x = 364,907,283.19/21,730.68
  6. Step 6: Final answer
    x = 16,792.26

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1.5x scale

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.