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Finding the Fourth Proportional to 8,588.16, 12,879 and 4,430.43

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Solution

The fourth proportional to 8,588.16, 12,879 and 4,430.43 is: 6,643.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,588.16 : 12,879 = 4,430.43 : x
  2. Step 2: Convert to fraction form
    8,588.16/12,879 = 4,430.43/x
  3. Step 3: Cross multiply
    8,588.16x = 12,879 × 4,430.43
  4. Step 4: Simplify right side
    8,588.16x = 57,059,507.97
  5. Step 5: Solve for x
    x = 57,059,507.97/8,588.16
  6. Step 6: Final answer
    x = 6,643.97

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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.