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Finding the Fourth Proportional to 11,878.11, 17,823.30 and 8,618.07

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Solution

The fourth proportional to 11,878.11, 17,823.30 and 8,618.07 is: 12,931.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,878.11 : 17,823.30 = 8,618.07 : x
  2. Step 2: Convert to fraction form
    11,878.11/17,823.30 = 8,618.07/x
  3. Step 3: Cross multiply
    11,878.11x = 17,823.30 × 8,618.07
  4. Step 4: Simplify right side
    11,878.11x = 153,602,447.03
  5. Step 5: Solve for x
    x = 153,602,447.03/11,878.11
  6. Step 6: Final answer
    x = 12,931.56

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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.