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Finding the Fourth Proportional to 8,398.76, 11,590.32 and 4,622.30

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Solution

The fourth proportional to 8,398.76, 11,590.32 and 4,622.30 is: 6,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.76 : 11,590.32 = 4,622.30 : x
  2. Step 2: Convert to fraction form
    8,398.76/11,590.32 = 4,622.30/x
  3. Step 3: Cross multiply
    8,398.76x = 11,590.32 × 4,622.30
  4. Step 4: Simplify right side
    8,398.76x = 53,573,938.98
  5. Step 5: Solve for x
    x = 53,573,938.98/8,398.76
  6. Step 6: Final answer
    x = 6,378.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.