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Finding the Fourth Proportional to 12,558.79, 18,838.17 and 11,728.42

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Solution

The fourth proportional to 12,558.79, 18,838.17 and 11,728.42 is: 17,592.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,558.79 : 18,838.17 = 11,728.42 : x
  2. Step 2: Convert to fraction form
    12,558.79/18,838.17 = 11,728.42/x
  3. Step 3: Cross multiply
    12,558.79x = 18,838.17 × 11,728.42
  4. Step 4: Simplify right side
    12,558.79x = 220,941,969.79
  5. Step 5: Solve for x
    x = 220,941,969.79/12,558.79
  6. Step 6: Final answer
    x = 17,592.62

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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.