Home / 21,007.95-31,521.19-11,144.81

Finding the Fourth Proportional to 21,007.95, 31,521.19 and 11,144.81

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Solution

The fourth proportional to 21,007.95, 31,521.19 and 11,144.81 is: 16,722.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.95 : 31,521.19 = 11,144.81 : x
  2. Step 2: Convert to fraction form
    21,007.95/31,521.19 = 11,144.81/x
  3. Step 3: Cross multiply
    21,007.95x = 31,521.19 × 11,144.81
  4. Step 4: Simplify right side
    21,007.95x = 351,297,673.52
  5. Step 5: Solve for x
    x = 351,297,673.52/21,007.95
  6. Step 6: Final answer
    x = 16,722.13

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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.