Home / 14,135.64-21,214.46-7,122.68

Finding the Fourth Proportional to 14,135.64, 21,214.46 and 7,122.68

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Solution

The fourth proportional to 14,135.64, 21,214.46 and 7,122.68 is: 10,689.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,135.64 : 21,214.46 = 7,122.68 : x
  2. Step 2: Convert to fraction form
    14,135.64/21,214.46 = 7,122.68/x
  3. Step 3: Cross multiply
    14,135.64x = 21,214.46 × 7,122.68
  4. Step 4: Simplify right side
    14,135.64x = 151,103,809.95
  5. Step 5: Solve for x
    x = 151,103,809.95/14,135.64
  6. Step 6: Final answer
    x = 10,689.56

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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.