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Finding the Fourth Proportional to 5,079.10, 7,009.10 and 2,840.96

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Solution

The fourth proportional to 5,079.10, 7,009.10 and 2,840.96 is: 3,920.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,079.10 : 7,009.10 = 2,840.96 : x
  2. Step 2: Convert to fraction form
    5,079.10/7,009.10 = 2,840.96/x
  3. Step 3: Cross multiply
    5,079.10x = 7,009.10 × 2,840.96
  4. Step 4: Simplify right side
    5,079.10x = 19,912,572.74
  5. Step 5: Solve for x
    x = 19,912,572.74/5,079.10
  6. Step 6: Final answer
    x = 3,920.49

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Half 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.