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Finding the Fourth Proportional to 16,990.84, 23,443.50 and 9,918.28

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Solution

The fourth proportional to 16,990.84, 23,443.50 and 9,918.28 is: 13,684.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,990.84 : 23,443.50 = 9,918.28 : x
  2. Step 2: Convert to fraction form
    16,990.84/23,443.50 = 9,918.28/x
  3. Step 3: Cross multiply
    16,990.84x = 23,443.50 × 9,918.28
  4. Step 4: Simplify right side
    16,990.84x = 232,519,197.18
  5. Step 5: Solve for x
    x = 232,519,197.18/16,990.84
  6. Step 6: Final answer
    x = 13,684.97

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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.