Home / 21,859.09-30,164.66-12,299.18

Finding the Fourth Proportional to 21,859.09, 30,164.66 and 12,299.18

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Solution

The fourth proportional to 21,859.09, 30,164.66 and 12,299.18 is: 16,972.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.09 : 30,164.66 = 12,299.18 : x
  2. Step 2: Convert to fraction form
    21,859.09/30,164.66 = 12,299.18/x
  3. Step 3: Cross multiply
    21,859.09x = 30,164.66 × 12,299.18
  4. Step 4: Simplify right side
    21,859.09x = 371,000,432.16
  5. Step 5: Solve for x
    x = 371,000,432.16/21,859.09
  6. Step 6: Final answer
    x = 16,972.37

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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.