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Finding the Fourth Proportional to 8,513.79, 11,747.99 and 5,158.17

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Solution

The fourth proportional to 8,513.79, 11,747.99 and 5,158.17 is: 7,117.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,513.79 : 11,747.99 = 5,158.17 : x
  2. Step 2: Convert to fraction form
    8,513.79/11,747.99 = 5,158.17/x
  3. Step 3: Cross multiply
    8,513.79x = 11,747.99 × 5,158.17
  4. Step 4: Simplify right side
    8,513.79x = 60,598,103.79
  5. Step 5: Solve for x
    x = 60,598,103.79/8,513.79
  6. Step 6: Final answer
    x = 7,117.64

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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.