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Finding the Fourth Proportional to 6,509.80, 9,783.90 and 6,394.60

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Solution

The fourth proportional to 6,509.80, 9,783.90 and 6,394.60 is: 9,610.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,509.80 : 9,783.90 = 6,394.60 : x
  2. Step 2: Convert to fraction form
    6,509.80/9,783.90 = 6,394.60/x
  3. Step 3: Cross multiply
    6,509.80x = 9,783.90 × 6,394.60
  4. Step 4: Simplify right side
    6,509.80x = 62,564,126.94
  5. Step 5: Solve for x
    x = 62,564,126.94/6,509.80
  6. Step 6: Final answer
    x = 9,610.76

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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.