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Finding the Fourth Proportional to 8,312.86, 12,455.55 and 7,455.34

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Solution

The fourth proportional to 8,312.86, 12,455.55 and 7,455.34 is: 11,170.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.86 : 12,455.55 = 7,455.34 : x
  2. Step 2: Convert to fraction form
    8,312.86/12,455.55 = 7,455.34/x
  3. Step 3: Cross multiply
    8,312.86x = 12,455.55 × 7,455.34
  4. Step 4: Simplify right side
    8,312.86x = 92,860,360.14
  5. Step 5: Solve for x
    x = 92,860,360.14/8,312.86
  6. Step 6: Final answer
    x = 11,170.69

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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.