Home / 8,638.61-11,920.23-5,450.71

Finding the Fourth Proportional to 8,638.61, 11,920.23 and 5,450.71

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Solution

The fourth proportional to 8,638.61, 11,920.23 and 5,450.71 is: 7,521.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.61 : 11,920.23 = 5,450.71 : x
  2. Step 2: Convert to fraction form
    8,638.61/11,920.23 = 5,450.71/x
  3. Step 3: Cross multiply
    8,638.61x = 11,920.23 × 5,450.71
  4. Step 4: Simplify right side
    8,638.61x = 64,973,716.86
  5. Step 5: Solve for x
    x = 64,973,716.86/8,638.61
  6. Step 6: Final answer
    x = 7,521.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.