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Finding the Fourth Proportional to 8,391.84, 11,581.04 and 4,615.30

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Solution

The fourth proportional to 8,391.84, 11,581.04 and 4,615.30 is: 6,369.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.84 : 11,581.04 = 4,615.30 : x
  2. Step 2: Convert to fraction form
    8,391.84/11,581.04 = 4,615.30/x
  3. Step 3: Cross multiply
    8,391.84x = 11,581.04 × 4,615.30
  4. Step 4: Simplify right side
    8,391.84x = 53,449,973.91
  5. Step 5: Solve for x
    x = 53,449,973.91/8,391.84
  6. Step 6: Final answer
    x = 6,369.28

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1.5x scale

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.