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Finding the Fourth Proportional to 8,645.15, 11,930.15 and 4,868.30

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Solution

The fourth proportional to 8,645.15, 11,930.15 and 4,868.30 is: 6,718.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.15 : 11,930.15 = 4,868.30 : x
  2. Step 2: Convert to fraction form
    8,645.15/11,930.15 = 4,868.30/x
  3. Step 3: Cross multiply
    8,645.15x = 11,930.15 × 4,868.30
  4. Step 4: Simplify right side
    8,645.15x = 58,079,549.25
  5. Step 5: Solve for x
    x = 58,079,549.25/8,645.15
  6. Step 6: Final answer
    x = 6,718.17

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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.