Home / 11,318.42-16,900.39-9,990.98

Finding the Fourth Proportional to 11,318.42, 16,900.39 and 9,990.98

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Solution

The fourth proportional to 11,318.42, 16,900.39 and 9,990.98 is: 14,918.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,318.42 : 16,900.39 = 9,990.98 : x
  2. Step 2: Convert to fraction form
    11,318.42/16,900.39 = 9,990.98/x
  3. Step 3: Cross multiply
    11,318.42x = 16,900.39 × 9,990.98
  4. Step 4: Simplify right side
    11,318.42x = 168,851,408.53
  5. Step 5: Solve for x
    x = 168,851,408.53/11,318.42
  6. Step 6: Final answer
    x = 14,918.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.