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Finding the Fourth Proportional to 5,104.64, 7,639.68 and 3,615.68

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Solution

The fourth proportional to 5,104.64, 7,639.68 and 3,615.68 is: 5,411.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,104.64 : 7,639.68 = 3,615.68 : x
  2. Step 2: Convert to fraction form
    5,104.64/7,639.68 = 3,615.68/x
  3. Step 3: Cross multiply
    5,104.64x = 7,639.68 × 3,615.68
  4. Step 4: Simplify right side
    5,104.64x = 27,622,638.18
  5. Step 5: Solve for x
    x = 27,622,638.18/5,104.64
  6. Step 6: Final answer
    x = 5,411.28

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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.