Home / 14,078.81-21,122.90-4,719.75

Finding the Fourth Proportional to 14,078.81, 21,122.90 and 4,719.75

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Solution

The fourth proportional to 14,078.81, 21,122.90 and 4,719.75 is: 7,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,078.81 : 21,122.90 = 4,719.75 : x
  2. Step 2: Convert to fraction form
    14,078.81/21,122.90 = 4,719.75/x
  3. Step 3: Cross multiply
    14,078.81x = 21,122.90 × 4,719.75
  4. Step 4: Simplify right side
    14,078.81x = 99,694,783.68
  5. Step 5: Solve for x
    x = 99,694,783.68/14,078.81
  6. Step 6: Final answer
    x = 7,081.20

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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.