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Finding the Fourth Proportional to 8,903.72, 12,285.54 and 5,177

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Solution

The fourth proportional to 8,903.72, 12,285.54 and 5,177 is: 7,143.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,903.72 : 12,285.54 = 5,177 : x
  2. Step 2: Convert to fraction form
    8,903.72/12,285.54 = 5,177/x
  3. Step 3: Cross multiply
    8,903.72x = 12,285.54 × 5,177
  4. Step 4: Simplify right side
    8,903.72x = 63,602,240.58
  5. Step 5: Solve for x
    x = 63,602,240.58/8,903.72
  6. Step 6: Final answer
    x = 7,143.33

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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.