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Finding the Fourth Proportional to 12,672.98, 18,993.03 and 5,642.99

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Solution

The fourth proportional to 12,672.98, 18,993.03 and 5,642.99 is: 8,457.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.98 : 18,993.03 = 5,642.99 : x
  2. Step 2: Convert to fraction form
    12,672.98/18,993.03 = 5,642.99/x
  3. Step 3: Cross multiply
    12,672.98x = 18,993.03 × 5,642.99
  4. Step 4: Simplify right side
    12,672.98x = 107,177,478.36
  5. Step 5: Solve for x
    x = 107,177,478.36/12,672.98
  6. Step 6: Final answer
    x = 8,457.16

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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.