Home / 11,252.40-15,534.94-7,720.80

Finding the Fourth Proportional to 11,252.40, 15,534.94 and 7,720.80

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Solution

The fourth proportional to 11,252.40, 15,534.94 and 7,720.80 is: 10,659.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,252.40 : 15,534.94 = 7,720.80 : x
  2. Step 2: Convert to fraction form
    11,252.40/15,534.94 = 7,720.80/x
  3. Step 3: Cross multiply
    11,252.40x = 15,534.94 × 7,720.80
  4. Step 4: Simplify right side
    11,252.40x = 119,942,164.75
  5. Step 5: Solve for x
    x = 119,942,164.75/11,252.40
  6. Step 6: Final answer
    x = 10,659.25

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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.