Home / 12,938.07-19,406.43-4,172.99

Finding the Fourth Proportional to 12,938.07, 19,406.43 and 4,172.99

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Solution

The fourth proportional to 12,938.07, 19,406.43 and 4,172.99 is: 6,259.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.07 : 19,406.43 = 4,172.99 : x
  2. Step 2: Convert to fraction form
    12,938.07/19,406.43 = 4,172.99/x
  3. Step 3: Cross multiply
    12,938.07x = 19,406.43 × 4,172.99
  4. Step 4: Simplify right side
    12,938.07x = 80,982,814.07
  5. Step 5: Solve for x
    x = 80,982,814.07/12,938.07
  6. Step 6: Final answer
    x = 6,259.26

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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.