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Finding the Fourth Proportional to 16,990.29, 23,448.08 and 9,918.99

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Solution

The fourth proportional to 16,990.29, 23,448.08 and 9,918.99 is: 13,689.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,990.29 : 23,448.08 = 9,918.99 : x
  2. Step 2: Convert to fraction form
    16,990.29/23,448.08 = 9,918.99/x
  3. Step 3: Cross multiply
    16,990.29x = 23,448.08 × 9,918.99
  4. Step 4: Simplify right side
    16,990.29x = 232,581,295.84
  5. Step 5: Solve for x
    x = 232,581,295.84/16,990.29
  6. Step 6: Final answer
    x = 13,689.07

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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.