Home / 7,078.72-10,619.76-2,148.64

Finding the Fourth Proportional to 7,078.72, 10,619.76 and 2,148.64

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Solution

The fourth proportional to 7,078.72, 10,619.76 and 2,148.64 is: 3,223.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,078.72 : 10,619.76 = 2,148.64 : x
  2. Step 2: Convert to fraction form
    7,078.72/10,619.76 = 2,148.64/x
  3. Step 3: Cross multiply
    7,078.72x = 10,619.76 × 2,148.64
  4. Step 4: Simplify right side
    7,078.72x = 22,818,041.13
  5. Step 5: Solve for x
    x = 22,818,041.13/7,078.72
  6. Step 6: Final answer
    x = 3,223.47

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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.