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Finding the Fourth Proportional to 11,235.90, 16,821.45 and 9,939.90

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Solution

The fourth proportional to 11,235.90, 16,821.45 and 9,939.90 is: 14,881.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,235.90 : 16,821.45 = 9,939.90 : x
  2. Step 2: Convert to fraction form
    11,235.90/16,821.45 = 9,939.90/x
  3. Step 3: Cross multiply
    11,235.90x = 16,821.45 × 9,939.90
  4. Step 4: Simplify right side
    11,235.90x = 167,203,530.86
  5. Step 5: Solve for x
    x = 167,203,530.86/11,235.90
  6. Step 6: Final answer
    x = 14,881.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.