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Finding the Fourth Proportional to 18,606.20, 27,916.14 and 8,615.75

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Solution

The fourth proportional to 18,606.20, 27,916.14 and 8,615.75 is: 12,926.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,606.20 : 27,916.14 = 8,615.75 : x
  2. Step 2: Convert to fraction form
    18,606.20/27,916.14 = 8,615.75/x
  3. Step 3: Cross multiply
    18,606.20x = 27,916.14 × 8,615.75
  4. Step 4: Simplify right side
    18,606.20x = 240,518,483.21
  5. Step 5: Solve for x
    x = 240,518,483.21/18,606.20
  6. Step 6: Final answer
    x = 12,926.79

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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.