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Finding the Fourth Proportional to 18,723.66, 28,071.60 and 8,851.40

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Solution

The fourth proportional to 18,723.66, 28,071.60 and 8,851.40 is: 13,270.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.66 : 28,071.60 = 8,851.40 : x
  2. Step 2: Convert to fraction form
    18,723.66/28,071.60 = 8,851.40/x
  3. Step 3: Cross multiply
    18,723.66x = 28,071.60 × 8,851.40
  4. Step 4: Simplify right side
    18,723.66x = 248,472,960.24
  5. Step 5: Solve for x
    x = 248,472,960.24/18,723.66
  6. Step 6: Final answer
    x = 13,270.53

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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.