Home / 5,155.92-7,115.18-2,798.07

Finding the Fourth Proportional to 5,155.92, 7,115.18 and 2,798.07

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Solution

The fourth proportional to 5,155.92, 7,115.18 and 2,798.07 is: 3,861.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.92 : 7,115.18 = 2,798.07 : x
  2. Step 2: Convert to fraction form
    5,155.92/7,115.18 = 2,798.07/x
  3. Step 3: Cross multiply
    5,155.92x = 7,115.18 × 2,798.07
  4. Step 4: Simplify right side
    5,155.92x = 19,908,757.71
  5. Step 5: Solve for x
    x = 19,908,757.71/5,155.92
  6. Step 6: Final answer
    x = 3,861.34

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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.