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Finding the Fourth Proportional to 16,988.45, 25,491.84 and 9,982.16

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Solution

The fourth proportional to 16,988.45, 25,491.84 and 9,982.16 is: 14,978.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,988.45 : 25,491.84 = 9,982.16 : x
  2. Step 2: Convert to fraction form
    16,988.45/25,491.84 = 9,982.16/x
  3. Step 3: Cross multiply
    16,988.45x = 25,491.84 × 9,982.16
  4. Step 4: Simplify right side
    16,988.45x = 254,463,498.12
  5. Step 5: Solve for x
    x = 254,463,498.12/16,988.45
  6. Step 6: Final answer
    x = 14,978.62

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1.5x scale

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.