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Finding the Fourth Proportional to 15,903.14, 21,945.47 and 8,829.11

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Solution

The fourth proportional to 15,903.14, 21,945.47 and 8,829.11 is: 12,183.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,903.14 : 21,945.47 = 8,829.11 : x
  2. Step 2: Convert to fraction form
    15,903.14/21,945.47 = 8,829.11/x
  3. Step 3: Cross multiply
    15,903.14x = 21,945.47 × 8,829.11
  4. Step 4: Simplify right side
    15,903.14x = 193,758,880.98
  5. Step 5: Solve for x
    x = 193,758,880.98/15,903.14
  6. Step 6: Final answer
    x = 12,183.69

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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.