Home / 7,931.20-11,896.80-2,385.40

Finding the Fourth Proportional to 7,931.20, 11,896.80 and 2,385.40

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Solution

The fourth proportional to 7,931.20, 11,896.80 and 2,385.40 is: 3,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.20 : 11,896.80 = 2,385.40 : x
  2. Step 2: Convert to fraction form
    7,931.20/11,896.80 = 2,385.40/x
  3. Step 3: Cross multiply
    7,931.20x = 11,896.80 × 2,385.40
  4. Step 4: Simplify right side
    7,931.20x = 28,378,626.72
  5. Step 5: Solve for x
    x = 28,378,626.72/7,931.20
  6. Step 6: Final answer
    x = 3,578.10

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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.