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Finding the Fourth Proportional to 8,458.72, 11,671.77 and 7,518.58

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Solution

The fourth proportional to 8,458.72, 11,671.77 and 7,518.58 is: 10,374.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.72 : 11,671.77 = 7,518.58 : x
  2. Step 2: Convert to fraction form
    8,458.72/11,671.77 = 7,518.58/x
  3. Step 3: Cross multiply
    8,458.72x = 11,671.77 × 7,518.58
  4. Step 4: Simplify right side
    8,458.72x = 87,755,136.49
  5. Step 5: Solve for x
    x = 87,755,136.49/8,458.72
  6. Step 6: Final answer
    x = 10,374.52

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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.