Home / 7,820.19-10,794.80-5,171.20

Finding the Fourth Proportional to 7,820.19, 10,794.80 and 5,171.20

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Solution

The fourth proportional to 7,820.19, 10,794.80 and 5,171.20 is: 7,138.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820.19 : 10,794.80 = 5,171.20 : x
  2. Step 2: Convert to fraction form
    7,820.19/10,794.80 = 5,171.20/x
  3. Step 3: Cross multiply
    7,820.19x = 10,794.80 × 5,171.20
  4. Step 4: Simplify right side
    7,820.19x = 55,822,055.70
  5. Step 5: Solve for x
    x = 55,822,055.70/7,820.19
  6. Step 6: Final answer
    x = 7,138.20

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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.