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Finding the Fourth Proportional to 18,398.19, 25,388.80 and 10,439.94

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Solution

The fourth proportional to 18,398.19, 25,388.80 and 10,439.94 is: 14,406.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.19 : 25,388.80 = 10,439.94 : x
  2. Step 2: Convert to fraction form
    18,398.19/25,388.80 = 10,439.94/x
  3. Step 3: Cross multiply
    18,398.19x = 25,388.80 × 10,439.94
  4. Step 4: Simplify right side
    18,398.19x = 265,057,548.67
  5. Step 5: Solve for x
    x = 265,057,548.67/18,398.19
  6. Step 6: Final answer
    x = 14,406.72

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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.