Home / 7,477.20-11,215.80-5,144.40

Finding the Fourth Proportional to 7,477.20, 11,215.80 and 5,144.40

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Solution

The fourth proportional to 7,477.20, 11,215.80 and 5,144.40 is: 7,716.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,477.20 : 11,215.80 = 5,144.40 : x
  2. Step 2: Convert to fraction form
    7,477.20/11,215.80 = 5,144.40/x
  3. Step 3: Cross multiply
    7,477.20x = 11,215.80 × 5,144.40
  4. Step 4: Simplify right side
    7,477.20x = 57,698,561.52
  5. Step 5: Solve for x
    x = 57,698,561.52/7,477.20
  6. Step 6: Final answer
    x = 7,716.60

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Half scale
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Double scale
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Similar ratio
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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.