Home / 5,419.62-8,130.60-1,721.40

Finding the Fourth Proportional to 5,419.62, 8,130.60 and 1,721.40

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Solution

The fourth proportional to 5,419.62, 8,130.60 and 1,721.40 is: 2,582.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.62 : 8,130.60 = 1,721.40 : x
  2. Step 2: Convert to fraction form
    5,419.62/8,130.60 = 1,721.40/x
  3. Step 3: Cross multiply
    5,419.62x = 8,130.60 × 1,721.40
  4. Step 4: Simplify right side
    5,419.62x = 13,996,014.84
  5. Step 5: Solve for x
    x = 13,996,014.84/5,419.62
  6. Step 6: Final answer
    x = 2,582.47

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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.