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Finding the Fourth Proportional to 7,080.78, 10,628.53 and 6,921.94

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Solution

The fourth proportional to 7,080.78, 10,628.53 and 6,921.94 is: 10,390.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,080.78 : 10,628.53 = 6,921.94 : x
  2. Step 2: Convert to fraction form
    7,080.78/10,628.53 = 6,921.94/x
  3. Step 3: Cross multiply
    7,080.78x = 10,628.53 × 6,921.94
  4. Step 4: Simplify right side
    7,080.78x = 73,569,959.20
  5. Step 5: Solve for x
    x = 73,569,959.20/7,080.78
  6. Step 6: Final answer
    x = 10,390.09

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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.