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Finding the Fourth Proportional to 15,083.28, 20,814.95 and 8,796.87

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Solution

The fourth proportional to 15,083.28, 20,814.95 and 8,796.87 is: 12,139.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,083.28 : 20,814.95 = 8,796.87 : x
  2. Step 2: Convert to fraction form
    15,083.28/20,814.95 = 8,796.87/x
  3. Step 3: Cross multiply
    15,083.28x = 20,814.95 × 8,796.87
  4. Step 4: Simplify right side
    15,083.28x = 183,106,409.21
  5. Step 5: Solve for x
    x = 183,106,409.21/15,083.28
  6. Step 6: Final answer
    x = 12,139.69

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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.