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Finding the Fourth Proportional to 12,898.74, 17,790.81 and 8,114.04

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Solution

The fourth proportional to 12,898.74, 17,790.81 and 8,114.04 is: 11,191.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,898.74 : 17,790.81 = 8,114.04 : x
  2. Step 2: Convert to fraction form
    12,898.74/17,790.81 = 8,114.04/x
  3. Step 3: Cross multiply
    12,898.74x = 17,790.81 × 8,114.04
  4. Step 4: Simplify right side
    12,898.74x = 144,355,343.97
  5. Step 5: Solve for x
    x = 144,355,343.97/12,898.74
  6. Step 6: Final answer
    x = 11,191.43

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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.