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Finding the Fourth Proportional to 6,999.40, 10,628.72 and 6,999.40

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Solution

The fourth proportional to 6,999.40, 10,628.72 and 6,999.40 is: 10,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.40 : 10,628.72 = 6,999.40 : x
  2. Step 2: Convert to fraction form
    6,999.40/10,628.72 = 6,999.40/x
  3. Step 3: Cross multiply
    6,999.40x = 10,628.72 × 6,999.40
  4. Step 4: Simplify right side
    6,999.40x = 74,394,662.77
  5. Step 5: Solve for x
    x = 74,394,662.77/6,999.40
  6. Step 6: Final answer
    x = 10,628.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.