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Finding the Fourth Proportional to 7,643.70, 11,465.55 and 5,310.90

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Solution

The fourth proportional to 7,643.70, 11,465.55 and 5,310.90 is: 7,966.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,643.70 : 11,465.55 = 5,310.90 : x
  2. Step 2: Convert to fraction form
    7,643.70/11,465.55 = 5,310.90/x
  3. Step 3: Cross multiply
    7,643.70x = 11,465.55 × 5,310.90
  4. Step 4: Simplify right side
    7,643.70x = 60,892,389.50
  5. Step 5: Solve for x
    x = 60,892,389.50/7,643.70
  6. Step 6: Final answer
    x = 7,966.35

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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.