Home / 12,181.60-16,811.40-6,877.72

Finding the Fourth Proportional to 12,181.60, 16,811.40 and 6,877.72

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Solution

The fourth proportional to 12,181.60, 16,811.40 and 6,877.72 is: 9,491.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,181.60 : 16,811.40 = 6,877.72 : x
  2. Step 2: Convert to fraction form
    12,181.60/16,811.40 = 6,877.72/x
  3. Step 3: Cross multiply
    12,181.60x = 16,811.40 × 6,877.72
  4. Step 4: Simplify right side
    12,181.60x = 115,624,102.01
  5. Step 5: Solve for x
    x = 115,624,102.01/12,181.60
  6. Step 6: Final answer
    x = 9,491.70

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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.