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Finding the Fourth Proportional to 18,957.61, 26,158.98 and 10,998.69

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Solution

The fourth proportional to 18,957.61, 26,158.98 and 10,998.69 is: 15,176.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.61 : 26,158.98 = 10,998.69 : x
  2. Step 2: Convert to fraction form
    18,957.61/26,158.98 = 10,998.69/x
  3. Step 3: Cross multiply
    18,957.61x = 26,158.98 × 10,998.69
  4. Step 4: Simplify right side
    18,957.61x = 287,714,511.74
  5. Step 5: Solve for x
    x = 287,714,511.74/18,957.61
  6. Step 6: Final answer
    x = 15,176.73

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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.