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Finding the Fourth Proportional to 18,411.42, 25,410.26 and 10,859.88

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Solution

The fourth proportional to 18,411.42, 25,410.26 and 10,859.88 is: 14,988.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.42 : 25,410.26 = 10,859.88 : x
  2. Step 2: Convert to fraction form
    18,411.42/25,410.26 = 10,859.88/x
  3. Step 3: Cross multiply
    18,411.42x = 25,410.26 × 10,859.88
  4. Step 4: Simplify right side
    18,411.42x = 275,952,374.37
  5. Step 5: Solve for x
    x = 275,952,374.37/18,411.42
  6. Step 6: Final answer
    x = 14,988.11

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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.