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Finding the Fourth Proportional to 8,445.49, 12,663.93 and 2,821.13

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Solution

The fourth proportional to 8,445.49, 12,663.93 and 2,821.13 is: 4,230.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,445.49 : 12,663.93 = 2,821.13 : x
  2. Step 2: Convert to fraction form
    8,445.49/12,663.93 = 2,821.13/x
  3. Step 3: Cross multiply
    8,445.49x = 12,663.93 × 2,821.13
  4. Step 4: Simplify right side
    8,445.49x = 35,726,617.45
  5. Step 5: Solve for x
    x = 35,726,617.45/8,445.49
  6. Step 6: Final answer
    x = 4,230.26

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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.