Home / 13,420.84-20,121.98-5,101.40

Finding the Fourth Proportional to 13,420.84, 20,121.98 and 5,101.40

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Solution

The fourth proportional to 13,420.84, 20,121.98 and 5,101.40 is: 7,648.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.84 : 20,121.98 = 5,101.40 : x
  2. Step 2: Convert to fraction form
    13,420.84/20,121.98 = 5,101.40/x
  3. Step 3: Cross multiply
    13,420.84x = 20,121.98 × 5,101.40
  4. Step 4: Simplify right side
    13,420.84x = 102,650,268.77
  5. Step 5: Solve for x
    x = 102,650,268.77/13,420.84
  6. Step 6: Final answer
    x = 7,648.57

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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.