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Finding the Fourth Proportional to 15,091.81, 20,829.18 and 8,804.17

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Solution

The fourth proportional to 15,091.81, 20,829.18 and 8,804.17 is: 12,151.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,091.81 : 20,829.18 = 8,804.17 : x
  2. Step 2: Convert to fraction form
    15,091.81/20,829.18 = 8,804.17/x
  3. Step 3: Cross multiply
    15,091.81x = 20,829.18 × 8,804.17
  4. Step 4: Simplify right side
    15,091.81x = 183,383,641.68
  5. Step 5: Solve for x
    x = 183,383,641.68/15,091.81
  6. Step 6: Final answer
    x = 12,151.20

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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.