Home / 16,991.46-23,449.68-9,920.16

Finding the Fourth Proportional to 16,991.46, 23,449.68 and 9,920.16

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Solution

The fourth proportional to 16,991.46, 23,449.68 and 9,920.16 is: 13,690.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.46 : 23,449.68 = 9,920.16 : x
  2. Step 2: Convert to fraction form
    16,991.46/23,449.68 = 9,920.16/x
  3. Step 3: Cross multiply
    16,991.46x = 23,449.68 × 9,920.16
  4. Step 4: Simplify right side
    16,991.46x = 232,624,577.55
  5. Step 5: Solve for x
    x = 232,624,577.55/16,991.46
  6. Step 6: Final answer
    x = 13,690.68

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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.