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Finding the Fourth Proportional to 7,763.59, 11,645.28 and 1,920.21

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Solution

The fourth proportional to 7,763.59, 11,645.28 and 1,920.21 is: 2,880.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,763.59 : 11,645.28 = 1,920.21 : x
  2. Step 2: Convert to fraction form
    7,763.59/11,645.28 = 1,920.21/x
  3. Step 3: Cross multiply
    7,763.59x = 11,645.28 × 1,920.21
  4. Step 4: Simplify right side
    7,763.59x = 22,361,339.44
  5. Step 5: Solve for x
    x = 22,361,339.44/7,763.59
  6. Step 6: Final answer
    x = 2,880.28

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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.