Home / 20,885.10-31,322.76-9,781.22

Finding the Fourth Proportional to 20,885.10, 31,322.76 and 9,781.22

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Solution

The fourth proportional to 20,885.10, 31,322.76 and 9,781.22 is: 14,669.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.10 : 31,322.76 = 9,781.22 : x
  2. Step 2: Convert to fraction form
    20,885.10/31,322.76 = 9,781.22/x
  3. Step 3: Cross multiply
    20,885.10x = 31,322.76 × 9,781.22
  4. Step 4: Simplify right side
    20,885.10x = 306,374,806.57
  5. Step 5: Solve for x
    x = 306,374,806.57/20,885.10
  6. Step 6: Final answer
    x = 14,669.54

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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.