Home / 7,478.60-11,218.21-2,798.12

Finding the Fourth Proportional to 7,478.60, 11,218.21 and 2,798.12

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Solution

The fourth proportional to 7,478.60, 11,218.21 and 2,798.12 is: 4,197.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.60 : 11,218.21 = 2,798.12 : x
  2. Step 2: Convert to fraction form
    7,478.60/11,218.21 = 2,798.12/x
  3. Step 3: Cross multiply
    7,478.60x = 11,218.21 × 2,798.12
  4. Step 4: Simplify right side
    7,478.60x = 31,389,918.82
  5. Step 5: Solve for x
    x = 31,389,918.82/7,478.60
  6. Step 6: Final answer
    x = 4,197.30

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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.