Home / 21,292.11-31,938.21-8,145.81

Finding the Fourth Proportional to 21,292.11, 31,938.21 and 8,145.81

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Solution

The fourth proportional to 21,292.11, 31,938.21 and 8,145.81 is: 12,218.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,292.11 : 31,938.21 = 8,145.81 : x
  2. Step 2: Convert to fraction form
    21,292.11/31,938.21 = 8,145.81/x
  3. Step 3: Cross multiply
    21,292.11x = 31,938.21 × 8,145.81
  4. Step 4: Simplify right side
    21,292.11x = 260,162,590.40
  5. Step 5: Solve for x
    x = 260,162,590.40/21,292.11
  6. Step 6: Final answer
    x = 12,218.73

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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.