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Finding the Fourth Proportional to 7,809.80, 11,714.70 and 7,445.30

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Solution

The fourth proportional to 7,809.80, 11,714.70 and 7,445.30 is: 11,167.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809.80 : 11,714.70 = 7,445.30 : x
  2. Step 2: Convert to fraction form
    7,809.80/11,714.70 = 7,445.30/x
  3. Step 3: Cross multiply
    7,809.80x = 11,714.70 × 7,445.30
  4. Step 4: Simplify right side
    7,809.80x = 87,219,455.91
  5. Step 5: Solve for x
    x = 87,219,455.91/7,809.80
  6. Step 6: Final answer
    x = 11,167.95

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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.