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Finding the Fourth Proportional to 18,698.92, 25,792.90 and 11,140.08

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Solution

The fourth proportional to 18,698.92, 25,792.90 and 11,140.08 is: 15,366.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.92 : 25,792.90 = 11,140.08 : x
  2. Step 2: Convert to fraction form
    18,698.92/25,792.90 = 11,140.08/x
  3. Step 3: Cross multiply
    18,698.92x = 25,792.90 × 11,140.08
  4. Step 4: Simplify right side
    18,698.92x = 287,334,969.43
  5. Step 5: Solve for x
    x = 287,334,969.43/18,698.92
  6. Step 6: Final answer
    x = 15,366.39

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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.