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Finding the Fourth Proportional to 16,421.85, 22,661.82 and 9,348.12

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Solution

The fourth proportional to 16,421.85, 22,661.82 and 9,348.12 is: 12,900.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,421.85 : 22,661.82 = 9,348.12 : x
  2. Step 2: Convert to fraction form
    16,421.85/22,661.82 = 9,348.12/x
  3. Step 3: Cross multiply
    16,421.85x = 22,661.82 × 9,348.12
  4. Step 4: Simplify right side
    16,421.85x = 211,845,412.78
  5. Step 5: Solve for x
    x = 211,845,412.78/16,421.85
  6. Step 6: Final answer
    x = 12,900.22

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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.