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Finding the Fourth Proportional to 5,641.86, 7,785.78 and 3,124.14

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Solution

The fourth proportional to 5,641.86, 7,785.78 and 3,124.14 is: 4,311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,641.86 : 7,785.78 = 3,124.14 : x
  2. Step 2: Convert to fraction form
    5,641.86/7,785.78 = 3,124.14/x
  3. Step 3: Cross multiply
    5,641.86x = 7,785.78 × 3,124.14
  4. Step 4: Simplify right side
    5,641.86x = 24,323,866.73
  5. Step 5: Solve for x
    x = 24,323,866.73/5,641.86
  6. Step 6: Final answer
    x = 4,311.32

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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.