Home / 21,209.76-29,268.14-12,255.81

Finding the Fourth Proportional to 21,209.76, 29,268.14 and 12,255.81

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Solution

The fourth proportional to 21,209.76, 29,268.14 and 12,255.81 is: 16,912.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.76 : 29,268.14 = 12,255.81 : x
  2. Step 2: Convert to fraction form
    21,209.76/29,268.14 = 12,255.81/x
  3. Step 3: Cross multiply
    21,209.76x = 29,268.14 × 12,255.81
  4. Step 4: Simplify right side
    21,209.76x = 358,704,701.61
  5. Step 5: Solve for x
    x = 358,704,701.61/21,209.76
  6. Step 6: Final answer
    x = 16,912.25

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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.