Home / 21,209.65-29,269.35-11,778.21

Finding the Fourth Proportional to 21,209.65, 29,269.35 and 11,778.21

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Solution

The fourth proportional to 21,209.65, 29,269.35 and 11,778.21 is: 16,253.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.65 : 29,269.35 = 11,778.21 : x
  2. Step 2: Convert to fraction form
    21,209.65/29,269.35 = 11,778.21/x
  3. Step 3: Cross multiply
    21,209.65x = 29,269.35 × 11,778.21
  4. Step 4: Simplify right side
    21,209.65x = 344,740,550.86
  5. Step 5: Solve for x
    x = 344,740,550.86/21,209.65
  6. Step 6: Final answer
    x = 16,253.95

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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.