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Finding the Fourth Proportional to 8,638.16, 11,905.04 and 6,499.17

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Solution

The fourth proportional to 8,638.16, 11,905.04 and 6,499.17 is: 8,957.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.16 : 11,905.04 = 6,499.17 : x
  2. Step 2: Convert to fraction form
    8,638.16/11,905.04 = 6,499.17/x
  3. Step 3: Cross multiply
    8,638.16x = 11,905.04 × 6,499.17
  4. Step 4: Simplify right side
    8,638.16x = 77,372,878.82
  5. Step 5: Solve for x
    x = 77,372,878.82/8,638.16
  6. Step 6: Final answer
    x = 8,957.10

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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.