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Finding the Fourth Proportional to 18,988.60, 26,200.62 and 11,028.04

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Solution

The fourth proportional to 18,988.60, 26,200.62 and 11,028.04 is: 15,216.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.60 : 26,200.62 = 11,028.04 : x
  2. Step 2: Convert to fraction form
    18,988.60/26,200.62 = 11,028.04/x
  3. Step 3: Cross multiply
    18,988.60x = 26,200.62 × 11,028.04
  4. Step 4: Simplify right side
    18,988.60x = 288,941,485.38
  5. Step 5: Solve for x
    x = 288,941,485.38/18,988.60
  6. Step 6: Final answer
    x = 15,216.58

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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.