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Finding the Fourth Proportional to 16,421.57, 22,661.79 and 8,969.57

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Solution

The fourth proportional to 16,421.57, 22,661.79 and 8,969.57 is: 12,378.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,421.57 : 22,661.79 = 8,969.57 : x
  2. Step 2: Convert to fraction form
    16,421.57/22,661.79 = 8,969.57/x
  3. Step 3: Cross multiply
    16,421.57x = 22,661.79 × 8,969.57
  4. Step 4: Simplify right side
    16,421.57x = 203,266,398.42
  5. Step 5: Solve for x
    x = 203,266,398.42/16,421.57
  6. Step 6: Final answer
    x = 12,378.02

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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.