Home / 14,143.97-21,218.69-5,378.20

Finding the Fourth Proportional to 14,143.97, 21,218.69 and 5,378.20

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Solution

The fourth proportional to 14,143.97, 21,218.69 and 5,378.20 is: 8,068.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,143.97 : 21,218.69 = 5,378.20 : x
  2. Step 2: Convert to fraction form
    14,143.97/21,218.69 = 5,378.20/x
  3. Step 3: Cross multiply
    14,143.97x = 21,218.69 × 5,378.20
  4. Step 4: Simplify right side
    14,143.97x = 114,118,278.62
  5. Step 5: Solve for x
    x = 114,118,278.62/14,143.97
  6. Step 6: Final answer
    x = 8,068.33

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1.5x scale

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.