Home / 11,100.30-15,314.04-7,120.80

Finding the Fourth Proportional to 11,100.30, 15,314.04 and 7,120.80

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Solution

The fourth proportional to 11,100.30, 15,314.04 and 7,120.80 is: 9,823.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,100.30 : 15,314.04 = 7,120.80 : x
  2. Step 2: Convert to fraction form
    11,100.30/15,314.04 = 7,120.80/x
  3. Step 3: Cross multiply
    11,100.30x = 15,314.04 × 7,120.80
  4. Step 4: Simplify right side
    11,100.30x = 109,048,216.03
  5. Step 5: Solve for x
    x = 109,048,216.03/11,100.30
  6. Step 6: Final answer
    x = 9,823.90

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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.