Home / 9,120.69-13,661.55-8,428.95

Finding the Fourth Proportional to 9,120.69, 13,661.55 and 8,428.95

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Solution

The fourth proportional to 9,120.69, 13,661.55 and 8,428.95 is: 12,625.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.69 : 13,661.55 = 8,428.95 : x
  2. Step 2: Convert to fraction form
    9,120.69/13,661.55 = 8,428.95/x
  3. Step 3: Cross multiply
    9,120.69x = 13,661.55 × 8,428.95
  4. Step 4: Simplify right side
    9,120.69x = 115,152,521.87
  5. Step 5: Solve for x
    x = 115,152,521.87/9,120.69
  6. Step 6: Final answer
    x = 12,625.42

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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.