Home / 21,204.15-31,806.23-18,385.35

Finding the Fourth Proportional to 21,204.15, 31,806.23 and 18,385.35

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Solution

The fourth proportional to 21,204.15, 31,806.23 and 18,385.35 is: 27,578.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,204.15 : 31,806.23 = 18,385.35 : x
  2. Step 2: Convert to fraction form
    21,204.15/31,806.23 = 18,385.35/x
  3. Step 3: Cross multiply
    21,204.15x = 31,806.23 × 18,385.35
  4. Step 4: Simplify right side
    21,204.15x = 584,768,578.80
  5. Step 5: Solve for x
    x = 584,768,578.80/21,204.15
  6. Step 6: Final answer
    x = 27,578.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.