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Finding the Fourth Proportional to 13,642.99, 18,828.42 and 7,674.30

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Solution

The fourth proportional to 13,642.99, 18,828.42 and 7,674.30 is: 10,591.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,642.99 : 18,828.42 = 7,674.30 : x
  2. Step 2: Convert to fraction form
    13,642.99/18,828.42 = 7,674.30/x
  3. Step 3: Cross multiply
    13,642.99x = 18,828.42 × 7,674.30
  4. Step 4: Simplify right side
    13,642.99x = 144,494,914.83
  5. Step 5: Solve for x
    x = 144,494,914.83/13,642.99
  6. Step 6: Final answer
    x = 10,591.15

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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.