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Finding the Fourth Proportional to 15,166.87, 20,931.98 and 8,453.11

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Solution

The fourth proportional to 15,166.87, 20,931.98 and 8,453.11 is: 11,666.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,166.87 : 20,931.98 = 8,453.11 : x
  2. Step 2: Convert to fraction form
    15,166.87/20,931.98 = 8,453.11/x
  3. Step 3: Cross multiply
    15,166.87x = 20,931.98 × 8,453.11
  4. Step 4: Simplify right side
    15,166.87x = 176,940,329.46
  5. Step 5: Solve for x
    x = 176,940,329.46/15,166.87
  6. Step 6: Final answer
    x = 11,666.24

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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.