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Finding the Fourth Proportional to 13,558.90, 18,711.66 and 8,253.58

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Solution

The fourth proportional to 13,558.90, 18,711.66 and 8,253.58 is: 11,390.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.90 : 18,711.66 = 8,253.58 : x
  2. Step 2: Convert to fraction form
    13,558.90/18,711.66 = 8,253.58/x
  3. Step 3: Cross multiply
    13,558.90x = 18,711.66 × 8,253.58
  4. Step 4: Simplify right side
    13,558.90x = 154,438,182.74
  5. Step 5: Solve for x
    x = 154,438,182.74/13,558.90
  6. Step 6: Final answer
    x = 11,390.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.