Home / 7,928.34-11,890.07-5,478.90

Finding the Fourth Proportional to 7,928.34, 11,890.07 and 5,478.90

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Solution

The fourth proportional to 7,928.34, 11,890.07 and 5,478.90 is: 8,216.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928.34 : 11,890.07 = 5,478.90 : x
  2. Step 2: Convert to fraction form
    7,928.34/11,890.07 = 5,478.90/x
  3. Step 3: Cross multiply
    7,928.34x = 11,890.07 × 5,478.90
  4. Step 4: Simplify right side
    7,928.34x = 65,144,504.52
  5. Step 5: Solve for x
    x = 65,144,504.52/7,928.34
  6. Step 6: Final answer
    x = 8,216.66

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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.