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Finding the Fourth Proportional to 8,645.76, 12,971.68 and 4,266.32

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Solution

The fourth proportional to 8,645.76, 12,971.68 and 4,266.32 is: 6,400.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.76 : 12,971.68 = 4,266.32 : x
  2. Step 2: Convert to fraction form
    8,645.76/12,971.68 = 4,266.32/x
  3. Step 3: Cross multiply
    8,645.76x = 12,971.68 × 4,266.32
  4. Step 4: Simplify right side
    8,645.76x = 55,341,337.82
  5. Step 5: Solve for x
    x = 55,341,337.82/8,645.76
  6. Step 6: Final answer
    x = 6,400.98

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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.