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Finding the Fourth Proportional to 5,641.38, 7,785.11 and 3,157.38

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Solution

The fourth proportional to 5,641.38, 7,785.11 and 3,157.38 is: 4,357.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,641.38 : 7,785.11 = 3,157.38 : x
  2. Step 2: Convert to fraction form
    5,641.38/7,785.11 = 3,157.38/x
  3. Step 3: Cross multiply
    5,641.38x = 7,785.11 × 3,157.38
  4. Step 4: Simplify right side
    5,641.38x = 24,580,495.90
  5. Step 5: Solve for x
    x = 24,580,495.90/5,641.38
  6. Step 6: Final answer
    x = 4,357.18

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Half scale
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Double scale
Find fourth proportional to 5,642.38, 7,786.49 and 3,158.38
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.