Home / 8,078.45-11,148.17-4,721.78

Finding the Fourth Proportional to 8,078.45, 11,148.17 and 4,721.78

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Solution

The fourth proportional to 8,078.45, 11,148.17 and 4,721.78 is: 6,516.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.45 : 11,148.17 = 4,721.78 : x
  2. Step 2: Convert to fraction form
    8,078.45/11,148.17 = 4,721.78/x
  3. Step 3: Cross multiply
    8,078.45x = 11,148.17 × 4,721.78
  4. Step 4: Simplify right side
    8,078.45x = 52,639,206.14
  5. Step 5: Solve for x
    x = 52,639,206.14/8,078.45
  6. Step 6: Final answer
    x = 6,516.00

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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.