Home / 9,078.90-13,619.91-2,838.78

Finding the Fourth Proportional to 9,078.90, 13,619.91 and 2,838.78

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Solution

The fourth proportional to 9,078.90, 13,619.91 and 2,838.78 is: 4,258.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,078.90 : 13,619.91 = 2,838.78 : x
  2. Step 2: Convert to fraction form
    9,078.90/13,619.91 = 2,838.78/x
  3. Step 3: Cross multiply
    9,078.90x = 13,619.91 × 2,838.78
  4. Step 4: Simplify right side
    9,078.90x = 38,663,928.11
  5. Step 5: Solve for x
    x = 38,663,928.11/9,078.90
  6. Step 6: Final answer
    x = 4,258.66

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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.