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Finding the Fourth Proportional to 6,386.20, 9,579.30 and 6,386.20

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Solution

The fourth proportional to 6,386.20, 9,579.30 and 6,386.20 is: 9,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.20 : 9,579.30 = 6,386.20 : x
  2. Step 2: Convert to fraction form
    6,386.20/9,579.30 = 6,386.20/x
  3. Step 3: Cross multiply
    6,386.20x = 9,579.30 × 6,386.20
  4. Step 4: Simplify right side
    6,386.20x = 61,175,325.66
  5. Step 5: Solve for x
    x = 61,175,325.66/6,386.20
  6. Step 6: Final answer
    x = 9,579.30

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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.