Home / 14,079.78-21,120.81-3,691.50

Finding the Fourth Proportional to 14,079.78, 21,120.81 and 3,691.50

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Solution

The fourth proportional to 14,079.78, 21,120.81 and 3,691.50 is: 5,537.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,079.78 : 21,120.81 = 3,691.50 : x
  2. Step 2: Convert to fraction form
    14,079.78/21,120.81 = 3,691.50/x
  3. Step 3: Cross multiply
    14,079.78x = 21,120.81 × 3,691.50
  4. Step 4: Simplify right side
    14,079.78x = 77,967,470.12
  5. Step 5: Solve for x
    x = 77,967,470.12/14,079.78
  6. Step 6: Final answer
    x = 5,537.55

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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.