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Finding the Fourth Proportional to 18,412.65, 25,410.92 and 10,456.83

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Solution

The fourth proportional to 18,412.65, 25,410.92 and 10,456.83 is: 14,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412.65 : 25,410.92 = 10,456.83 : x
  2. Step 2: Convert to fraction form
    18,412.65/25,410.92 = 10,456.83/x
  3. Step 3: Cross multiply
    18,412.65x = 25,410.92 × 10,456.83
  4. Step 4: Simplify right side
    18,412.65x = 265,717,618.30
  5. Step 5: Solve for x
    x = 265,717,618.30/18,412.65
  6. Step 6: Final answer
    x = 14,431.25

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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.