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Finding the Fourth Proportional to 14,957.79, 20,640.68 and 8,243.03

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Solution

The fourth proportional to 14,957.79, 20,640.68 and 8,243.03 is: 11,374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,957.79 : 20,640.68 = 8,243.03 : x
  2. Step 2: Convert to fraction form
    14,957.79/20,640.68 = 8,243.03/x
  3. Step 3: Cross multiply
    14,957.79x = 20,640.68 × 8,243.03
  4. Step 4: Simplify right side
    14,957.79x = 170,141,600.04
  5. Step 5: Solve for x
    x = 170,141,600.04/14,957.79
  6. Step 6: Final answer
    x = 11,374.78

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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.