Home / 11,136.40-16,680.30-9,905.20

Finding the Fourth Proportional to 11,136.40, 16,680.30 and 9,905.20

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Solution

The fourth proportional to 11,136.40, 16,680.30 and 9,905.20 is: 14,836.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,136.40 : 16,680.30 = 9,905.20 : x
  2. Step 2: Convert to fraction form
    11,136.40/16,680.30 = 9,905.20/x
  3. Step 3: Cross multiply
    11,136.40x = 16,680.30 × 9,905.20
  4. Step 4: Simplify right side
    11,136.40x = 165,221,707.56
  5. Step 5: Solve for x
    x = 165,221,707.56/11,136.40
  6. Step 6: Final answer
    x = 14,836.19

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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.