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Finding the Fourth Proportional to 6,312.96, 8,712 and 3,518.16

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Solution

The fourth proportional to 6,312.96, 8,712 and 3,518.16 is: 4,855.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,312.96 : 8,712 = 3,518.16 : x
  2. Step 2: Convert to fraction form
    6,312.96/8,712 = 3,518.16/x
  3. Step 3: Cross multiply
    6,312.96x = 8,712 × 3,518.16
  4. Step 4: Simplify right side
    6,312.96x = 30,650,209.92
  5. Step 5: Solve for x
    x = 30,650,209.92/6,312.96
  6. Step 6: Final answer
    x = 4,855.13

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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.