Home / 5,665.41-7,817.81-3,147.21

Finding the Fourth Proportional to 5,665.41, 7,817.81 and 3,147.21

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Solution

The fourth proportional to 5,665.41, 7,817.81 and 3,147.21 is: 4,342.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,665.41 : 7,817.81 = 3,147.21 : x
  2. Step 2: Convert to fraction form
    5,665.41/7,817.81 = 3,147.21/x
  3. Step 3: Cross multiply
    5,665.41x = 7,817.81 × 3,147.21
  4. Step 4: Simplify right side
    5,665.41x = 24,604,274.07
  5. Step 5: Solve for x
    x = 24,604,274.07/5,665.41
  6. Step 6: Final answer
    x = 4,342.89

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Half scale
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Double scale
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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.