Home / 15,885.46-21,921.60-8,811.74

Finding the Fourth Proportional to 15,885.46, 21,921.60 and 8,811.74

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Solution

The fourth proportional to 15,885.46, 21,921.60 and 8,811.74 is: 12,160.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,885.46 : 21,921.60 = 8,811.74 : x
  2. Step 2: Convert to fraction form
    15,885.46/21,921.60 = 8,811.74/x
  3. Step 3: Cross multiply
    15,885.46x = 21,921.60 × 8,811.74
  4. Step 4: Simplify right side
    15,885.46x = 193,167,439.58
  5. Step 5: Solve for x
    x = 193,167,439.58/15,885.46
  6. Step 6: Final answer
    x = 12,160.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.