Home / 21,324.95-31,949.11-12,555.08

Finding the Fourth Proportional to 21,324.95, 31,949.11 and 12,555.08

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Solution

The fourth proportional to 21,324.95, 31,949.11 and 12,555.08 is: 18,810.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.95 : 31,949.11 = 12,555.08 : x
  2. Step 2: Convert to fraction form
    21,324.95/31,949.11 = 12,555.08/x
  3. Step 3: Cross multiply
    21,324.95x = 31,949.11 × 12,555.08
  4. Step 4: Simplify right side
    21,324.95x = 401,123,440.85
  5. Step 5: Solve for x
    x = 401,123,440.85/21,324.95
  6. Step 6: Final answer
    x = 18,810.06

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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.