Home / 9,928.08-13,689-6,391.44

Finding the Fourth Proportional to 9,928.08, 13,689 and 6,391.44

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Solution

The fourth proportional to 9,928.08, 13,689 and 6,391.44 is: 8,812.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,928.08 : 13,689 = 6,391.44 : x
  2. Step 2: Convert to fraction form
    9,928.08/13,689 = 6,391.44/x
  3. Step 3: Cross multiply
    9,928.08x = 13,689 × 6,391.44
  4. Step 4: Simplify right side
    9,928.08x = 87,492,422.16
  5. Step 5: Solve for x
    x = 87,492,422.16/9,928.08
  6. Step 6: Final answer
    x = 8,812.62

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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.