Home / 20,428.94-30,643.43-6,389.03

Finding the Fourth Proportional to 20,428.94, 30,643.43 and 6,389.03

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Solution

The fourth proportional to 20,428.94, 30,643.43 and 6,389.03 is: 9,583.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.94 : 30,643.43 = 6,389.03 : x
  2. Step 2: Convert to fraction form
    20,428.94/30,643.43 = 6,389.03/x
  3. Step 3: Cross multiply
    20,428.94x = 30,643.43 × 6,389.03
  4. Step 4: Simplify right side
    20,428.94x = 195,781,838.24
  5. Step 5: Solve for x
    x = 195,781,838.24/20,428.94
  6. Step 6: Final answer
    x = 9,583.56

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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.