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Finding the Fourth Proportional to 12,620.80, 18,933.84 and 4,300.16

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Solution

The fourth proportional to 12,620.80, 18,933.84 and 4,300.16 is: 6,451.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.80 : 18,933.84 = 4,300.16 : x
  2. Step 2: Convert to fraction form
    12,620.80/18,933.84 = 4,300.16/x
  3. Step 3: Cross multiply
    12,620.80x = 18,933.84 × 4,300.16
  4. Step 4: Simplify right side
    12,620.80x = 81,418,541.41
  5. Step 5: Solve for x
    x = 81,418,541.41/12,620.80
  6. Step 6: Final answer
    x = 6,451.14

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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.