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Finding the Fourth Proportional to 18,957.78, 26,158.92 and 10,998.54

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Solution

The fourth proportional to 18,957.78, 26,158.92 and 10,998.54 is: 15,176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.78 : 26,158.92 = 10,998.54 : x
  2. Step 2: Convert to fraction form
    18,957.78/26,158.92 = 10,998.54/x
  3. Step 3: Cross multiply
    18,957.78x = 26,158.92 × 10,998.54
  4. Step 4: Simplify right side
    18,957.78x = 287,709,927.98
  5. Step 5: Solve for x
    x = 287,709,927.98/18,957.78
  6. Step 6: Final answer
    x = 15,176.35

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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.