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Finding the Fourth Proportional to 11,130.80, 16,696.20 and 9,381.20

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Solution

The fourth proportional to 11,130.80, 16,696.20 and 9,381.20 is: 14,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,130.80 : 16,696.20 = 9,381.20 : x
  2. Step 2: Convert to fraction form
    11,130.80/16,696.20 = 9,381.20/x
  3. Step 3: Cross multiply
    11,130.80x = 16,696.20 × 9,381.20
  4. Step 4: Simplify right side
    11,130.80x = 156,630,391.44
  5. Step 5: Solve for x
    x = 156,630,391.44/11,130.80
  6. Step 6: Final answer
    x = 14,071.80

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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.