Home / 8,419.90-12,628.31-3,154.39

Finding the Fourth Proportional to 8,419.90, 12,628.31 and 3,154.39

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Solution

The fourth proportional to 8,419.90, 12,628.31 and 3,154.39 is: 4,731.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.90 : 12,628.31 = 3,154.39 : x
  2. Step 2: Convert to fraction form
    8,419.90/12,628.31 = 3,154.39/x
  3. Step 3: Cross multiply
    8,419.90x = 12,628.31 × 3,154.39
  4. Step 4: Simplify right side
    8,419.90x = 39,834,638.47
  5. Step 5: Solve for x
    x = 39,834,638.47/8,419.90
  6. Step 6: Final answer
    x = 4,731.01

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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.