Home / 14,120-21,172.40-4,756.90

Finding the Fourth Proportional to 14,120, 21,172.40 and 4,756.90

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Solution

The fourth proportional to 14,120, 21,172.40 and 4,756.90 is: 7,132.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,120 : 21,172.40 = 4,756.90 : x
  2. Step 2: Convert to fraction form
    14,120/21,172.40 = 4,756.90/x
  3. Step 3: Cross multiply
    14,120x = 21,172.40 × 4,756.90
  4. Step 4: Simplify right side
    14,120x = 100,714,989.56
  5. Step 5: Solve for x
    x = 100,714,989.56/14,120
  6. Step 6: Final answer
    x = 7,132.79

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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.