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Finding the Fourth Proportional to 16,666.88, 22,989.69 and 12,679.28

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Solution

The fourth proportional to 16,666.88, 22,989.69 and 12,679.28 is: 17,489.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,666.88 : 22,989.69 = 12,679.28 : x
  2. Step 2: Convert to fraction form
    16,666.88/22,989.69 = 12,679.28/x
  3. Step 3: Cross multiply
    16,666.88x = 22,989.69 × 12,679.28
  4. Step 4: Simplify right side
    16,666.88x = 291,492,716.62
  5. Step 5: Solve for x
    x = 291,492,716.62/16,666.88
  6. Step 6: Final answer
    x = 17,489.34

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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.