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Finding the Fourth Proportional to 9,721.76, 14,600.20 and 8,940.32

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Solution

The fourth proportional to 9,721.76, 14,600.20 and 8,940.32 is: 13,426.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,721.76 : 14,600.20 = 8,940.32 : x
  2. Step 2: Convert to fraction form
    9,721.76/14,600.20 = 8,940.32/x
  3. Step 3: Cross multiply
    9,721.76x = 14,600.20 × 8,940.32
  4. Step 4: Simplify right side
    9,721.76x = 130,530,387.06
  5. Step 5: Solve for x
    x = 130,530,387.06/9,721.76
  6. Step 6: Final answer
    x = 13,426.63

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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.