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Finding the Fourth Proportional to 8,398.10, 11,590.50 and 5,422.59

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Solution

The fourth proportional to 8,398.10, 11,590.50 and 5,422.59 is: 7,483.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.10 : 11,590.50 = 5,422.59 : x
  2. Step 2: Convert to fraction form
    8,398.10/11,590.50 = 5,422.59/x
  3. Step 3: Cross multiply
    8,398.10x = 11,590.50 × 5,422.59
  4. Step 4: Simplify right side
    8,398.10x = 62,850,529.40
  5. Step 5: Solve for x
    x = 62,850,529.40/8,398.10
  6. Step 6: Final answer
    x = 7,483.90

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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.