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Finding the Fourth Proportional to 18,677.92, 25,775.25 and 10,721.83

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Solution

The fourth proportional to 18,677.92, 25,775.25 and 10,721.83 is: 14,795.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.92 : 25,775.25 = 10,721.83 : x
  2. Step 2: Convert to fraction form
    18,677.92/25,775.25 = 10,721.83/x
  3. Step 3: Cross multiply
    18,677.92x = 25,775.25 × 10,721.83
  4. Step 4: Simplify right side
    18,677.92x = 276,357,848.71
  5. Step 5: Solve for x
    x = 276,357,848.71/18,677.92
  6. Step 6: Final answer
    x = 14,795.96

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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.