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Finding the Fourth Proportional to 8,615.16, 12,922.47 and 3,620.18

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Solution

The fourth proportional to 8,615.16, 12,922.47 and 3,620.18 is: 5,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.16 : 12,922.47 = 3,620.18 : x
  2. Step 2: Convert to fraction form
    8,615.16/12,922.47 = 3,620.18/x
  3. Step 3: Cross multiply
    8,615.16x = 12,922.47 × 3,620.18
  4. Step 4: Simplify right side
    8,615.16x = 46,781,699.75
  5. Step 5: Solve for x
    x = 46,781,699.75/8,615.16
  6. Step 6: Final answer
    x = 5,430.16

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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.