Home / 20,415.69-28,172.75-11,463.03

Finding the Fourth Proportional to 20,415.69, 28,172.75 and 11,463.03

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Solution

The fourth proportional to 20,415.69, 28,172.75 and 11,463.03 is: 15,818.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.69 : 28,172.75 = 11,463.03 : x
  2. Step 2: Convert to fraction form
    20,415.69/28,172.75 = 11,463.03/x
  3. Step 3: Cross multiply
    20,415.69x = 28,172.75 × 11,463.03
  4. Step 4: Simplify right side
    20,415.69x = 322,945,021.12
  5. Step 5: Solve for x
    x = 322,945,021.12/20,415.69
  6. Step 6: Final answer
    x = 15,818.47

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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.