Home / 8,380.04-11,556.10-7,119.72

Finding the Fourth Proportional to 8,380.04, 11,556.10 and 7,119.72

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Solution

The fourth proportional to 8,380.04, 11,556.10 and 7,119.72 is: 9,818.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,380.04 : 11,556.10 = 7,119.72 : x
  2. Step 2: Convert to fraction form
    8,380.04/11,556.10 = 7,119.72/x
  3. Step 3: Cross multiply
    8,380.04x = 11,556.10 × 7,119.72
  4. Step 4: Simplify right side
    8,380.04x = 82,276,196.29
  5. Step 5: Solve for x
    x = 82,276,196.29/8,380.04
  6. Step 6: Final answer
    x = 9,818.11

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Half scale
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Double scale
Find fourth proportional to 8,381.04, 11,557.48 and 7,120.72
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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.