Home / 21,204.36-31,806.64-12,433.12

Finding the Fourth Proportional to 21,204.36, 31,806.64 and 12,433.12

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Solution

The fourth proportional to 21,204.36, 31,806.64 and 12,433.12 is: 18,649.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,204.36 : 31,806.64 = 12,433.12 : x
  2. Step 2: Convert to fraction form
    21,204.36/31,806.64 = 12,433.12/x
  3. Step 3: Cross multiply
    21,204.36x = 31,806.64 × 12,433.12
  4. Step 4: Simplify right side
    21,204.36x = 395,455,771.92
  5. Step 5: Solve for x
    x = 395,455,771.92/21,204.36
  6. Step 6: Final answer
    x = 18,649.74

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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.