Home / 7,886.20-11,829.30-3,990.10

Finding the Fourth Proportional to 7,886.20, 11,829.30 and 3,990.10

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Solution

The fourth proportional to 7,886.20, 11,829.30 and 3,990.10 is: 5,985.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886.20 : 11,829.30 = 3,990.10 : x
  2. Step 2: Convert to fraction form
    7,886.20/11,829.30 = 3,990.10/x
  3. Step 3: Cross multiply
    7,886.20x = 11,829.30 × 3,990.10
  4. Step 4: Simplify right side
    7,886.20x = 47,200,089.93
  5. Step 5: Solve for x
    x = 47,200,089.93/7,886.20
  6. Step 6: Final answer
    x = 5,985.15

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.