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Finding the Fourth Proportional to 14,451.51, 21,675.51 and 3,920.86

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Solution

The fourth proportional to 14,451.51, 21,675.51 and 3,920.86 is: 5,880.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,451.51 : 21,675.51 = 3,920.86 : x
  2. Step 2: Convert to fraction form
    14,451.51/21,675.51 = 3,920.86/x
  3. Step 3: Cross multiply
    14,451.51x = 21,675.51 × 3,920.86
  4. Step 4: Simplify right side
    14,451.51x = 84,986,640.14
  5. Step 5: Solve for x
    x = 84,986,640.14/14,451.51
  6. Step 6: Final answer
    x = 5,880.81

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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.