Home / 20,895.14-31,301.70-12,111.60

Finding the Fourth Proportional to 20,895.14, 31,301.70 and 12,111.60

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Solution

The fourth proportional to 20,895.14, 31,301.70 and 12,111.60 is: 18,143.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,895.14 : 31,301.70 = 12,111.60 : x
  2. Step 2: Convert to fraction form
    20,895.14/31,301.70 = 12,111.60/x
  3. Step 3: Cross multiply
    20,895.14x = 31,301.70 × 12,111.60
  4. Step 4: Simplify right side
    20,895.14x = 379,113,669.72
  5. Step 5: Solve for x
    x = 379,113,669.72/20,895.14
  6. Step 6: Final answer
    x = 18,143.63

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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.