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Finding the Fourth Proportional to 8,445.90, 11,649.02 and 7,489.94

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Solution

The fourth proportional to 8,445.90, 11,649.02 and 7,489.94 is: 10,330.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,445.90 : 11,649.02 = 7,489.94 : x
  2. Step 2: Convert to fraction form
    8,445.90/11,649.02 = 7,489.94/x
  3. Step 3: Cross multiply
    8,445.90x = 11,649.02 × 7,489.94
  4. Step 4: Simplify right side
    8,445.90x = 87,250,365.16
  5. Step 5: Solve for x
    x = 87,250,365.16/8,445.90
  6. Step 6: Final answer
    x = 10,330.49

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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.