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Finding the Fourth Proportional to 17,929.32, 26,864.07 and 12,655.68

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Solution

The fourth proportional to 17,929.32, 26,864.07 and 12,655.68 is: 18,962.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,929.32 : 26,864.07 = 12,655.68 : x
  2. Step 2: Convert to fraction form
    17,929.32/26,864.07 = 12,655.68/x
  3. Step 3: Cross multiply
    17,929.32x = 26,864.07 × 12,655.68
  4. Step 4: Simplify right side
    17,929.32x = 339,983,073.42
  5. Step 5: Solve for x
    x = 339,983,073.42/17,929.32
  6. Step 6: Final answer
    x = 18,962.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.