Home / 5,419.36-8,128.56-1,470.47

Finding the Fourth Proportional to 5,419.36, 8,128.56 and 1,470.47

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Solution

The fourth proportional to 5,419.36, 8,128.56 and 1,470.47 is: 2,205.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.36 : 8,128.56 = 1,470.47 : x
  2. Step 2: Convert to fraction form
    5,419.36/8,128.56 = 1,470.47/x
  3. Step 3: Cross multiply
    5,419.36x = 8,128.56 × 1,470.47
  4. Step 4: Simplify right side
    5,419.36x = 11,952,803.62
  5. Step 5: Solve for x
    x = 11,952,803.62/5,419.36
  6. Step 6: Final answer
    x = 2,205.57

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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.