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Finding the Fourth Proportional to 14,957.80, 20,642.67 and 8,243.42

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Solution

The fourth proportional to 14,957.80, 20,642.67 and 8,243.42 is: 11,376.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,957.80 : 20,642.67 = 8,243.42 : x
  2. Step 2: Convert to fraction form
    14,957.80/20,642.67 = 8,243.42/x
  3. Step 3: Cross multiply
    14,957.80x = 20,642.67 × 8,243.42
  4. Step 4: Simplify right side
    14,957.80x = 170,166,095.52
  5. Step 5: Solve for x
    x = 170,166,095.52/14,957.80
  6. Step 6: Final answer
    x = 11,376.41

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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.