Home / 30,112.87-45,172.38-10,391.37

Finding the Fourth Proportional to 30,112.87, 45,172.38 and 10,391.37

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Solution

The fourth proportional to 30,112.87, 45,172.38 and 10,391.37 is: 15,588.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,112.87 : 45,172.38 = 10,391.37 : x
  2. Step 2: Convert to fraction form
    30,112.87/45,172.38 = 10,391.37/x
  3. Step 3: Cross multiply
    30,112.87x = 45,172.38 × 10,391.37
  4. Step 4: Simplify right side
    30,112.87x = 469,402,914.36
  5. Step 5: Solve for x
    x = 469,402,914.36/30,112.87
  6. Step 6: Final answer
    x = 15,588.12

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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.