Home / 21,661.20-29,885.66-12,709.08

Finding the Fourth Proportional to 21,661.20, 29,885.66 and 12,709.08

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Solution

The fourth proportional to 21,661.20, 29,885.66 and 12,709.08 is: 17,534.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.20 : 29,885.66 = 12,709.08 : x
  2. Step 2: Convert to fraction form
    21,661.20/29,885.66 = 12,709.08/x
  3. Step 3: Cross multiply
    21,661.20x = 29,885.66 × 12,709.08
  4. Step 4: Simplify right side
    21,661.20x = 379,819,243.79
  5. Step 5: Solve for x
    x = 379,819,243.79/21,661.20
  6. Step 6: Final answer
    x = 17,534.54

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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.