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Finding the Fourth Proportional to 11,885.71, 17,808.81 and 8,368.35

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Solution

The fourth proportional to 11,885.71, 17,808.81 and 8,368.35 is: 12,538.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,885.71 : 17,808.81 = 8,368.35 : x
  2. Step 2: Convert to fraction form
    11,885.71/17,808.81 = 8,368.35/x
  3. Step 3: Cross multiply
    11,885.71x = 17,808.81 × 8,368.35
  4. Step 4: Simplify right side
    11,885.71x = 149,030,266.12
  5. Step 5: Solve for x
    x = 149,030,266.12/11,885.71
  6. Step 6: Final answer
    x = 12,538.61

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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.