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Finding the Fourth Proportional to 18,578.61, 25,636.79 and 11,023.64

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Solution

The fourth proportional to 18,578.61, 25,636.79 and 11,023.64 is: 15,211.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.61 : 25,636.79 = 11,023.64 : x
  2. Step 2: Convert to fraction form
    18,578.61/25,636.79 = 11,023.64/x
  3. Step 3: Cross multiply
    18,578.61x = 25,636.79 × 11,023.64
  4. Step 4: Simplify right side
    18,578.61x = 282,610,688.60
  5. Step 5: Solve for x
    x = 282,610,688.60/18,578.61
  6. Step 6: Final answer
    x = 15,211.62

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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.