Home / 9,090.21-12,545.44-5,555.78

Finding the Fourth Proportional to 9,090.21, 12,545.44 and 5,555.78

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Solution

The fourth proportional to 9,090.21, 12,545.44 and 5,555.78 is: 7,667.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,090.21 : 12,545.44 = 5,555.78 : x
  2. Step 2: Convert to fraction form
    9,090.21/12,545.44 = 5,555.78/x
  3. Step 3: Cross multiply
    9,090.21x = 12,545.44 × 5,555.78
  4. Step 4: Simplify right side
    9,090.21x = 69,699,628.03
  5. Step 5: Solve for x
    x = 69,699,628.03/9,090.21
  6. Step 6: Final answer
    x = 7,667.55

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.