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Finding the Fourth Proportional to 7,760.79, 11,641.03 and 1,917.40

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Solution

The fourth proportional to 7,760.79, 11,641.03 and 1,917.40 is: 2,876.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,760.79 : 11,641.03 = 1,917.40 : x
  2. Step 2: Convert to fraction form
    7,760.79/11,641.03 = 1,917.40/x
  3. Step 3: Cross multiply
    7,760.79x = 11,641.03 × 1,917.40
  4. Step 4: Simplify right side
    7,760.79x = 22,320,510.92
  5. Step 5: Solve for x
    x = 22,320,510.92/7,760.79
  6. Step 6: Final answer
    x = 2,876.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.