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Finding the Fourth Proportional to 7,128.52, 10,621.73 and 6,352.60

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Solution

The fourth proportional to 7,128.52, 10,621.73 and 6,352.60 is: 9,465.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.52 : 10,621.73 = 6,352.60 : x
  2. Step 2: Convert to fraction form
    7,128.52/10,621.73 = 6,352.60/x
  3. Step 3: Cross multiply
    7,128.52x = 10,621.73 × 6,352.60
  4. Step 4: Simplify right side
    7,128.52x = 67,475,602.00
  5. Step 5: Solve for x
    x = 67,475,602.00/7,128.52
  6. Step 6: Final answer
    x = 9,465.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.