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Finding the Fourth Proportional to 8,647.50, 11,934.36 and 4,921.50

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Solution

The fourth proportional to 8,647.50, 11,934.36 and 4,921.50 is: 6,792.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.50 : 11,934.36 = 4,921.50 : x
  2. Step 2: Convert to fraction form
    8,647.50/11,934.36 = 4,921.50/x
  3. Step 3: Cross multiply
    8,647.50x = 11,934.36 × 4,921.50
  4. Step 4: Simplify right side
    8,647.50x = 58,734,952.74
  5. Step 5: Solve for x
    x = 58,734,952.74/8,647.50
  6. Step 6: Final answer
    x = 6,792.13

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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.