Home / 21,209.12-29,269.92-12,256.64

Finding the Fourth Proportional to 21,209.12, 29,269.92 and 12,256.64

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Solution

The fourth proportional to 21,209.12, 29,269.92 and 12,256.64 is: 16,914.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.12 : 29,269.92 = 12,256.64 : x
  2. Step 2: Convert to fraction form
    21,209.12/29,269.92 = 12,256.64/x
  3. Step 3: Cross multiply
    21,209.12x = 29,269.92 × 12,256.64
  4. Step 4: Simplify right side
    21,209.12x = 358,750,872.27
  5. Step 5: Solve for x
    x = 358,750,872.27/21,209.12
  6. Step 6: Final answer
    x = 16,914.93

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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.