Home / 19,129.81-28,696.37-5,278.81

Finding the Fourth Proportional to 19,129.81, 28,696.37 and 5,278.81

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Solution

The fourth proportional to 19,129.81, 28,696.37 and 5,278.81 is: 7,918.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,129.81 : 28,696.37 = 5,278.81 : x
  2. Step 2: Convert to fraction form
    19,129.81/28,696.37 = 5,278.81/x
  3. Step 3: Cross multiply
    19,129.81x = 28,696.37 × 5,278.81
  4. Step 4: Simplify right side
    19,129.81x = 151,482,684.92
  5. Step 5: Solve for x
    x = 151,482,684.92/19,129.81
  6. Step 6: Final answer
    x = 7,918.67

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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.