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Finding the Fourth Proportional to 6,668.32, 9,990.96 and 6,426.40

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Solution

The fourth proportional to 6,668.32, 9,990.96 and 6,426.40 is: 9,628.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,668.32 : 9,990.96 = 6,426.40 : x
  2. Step 2: Convert to fraction form
    6,668.32/9,990.96 = 6,426.40/x
  3. Step 3: Cross multiply
    6,668.32x = 9,990.96 × 6,426.40
  4. Step 4: Simplify right side
    6,668.32x = 64,205,905.34
  5. Step 5: Solve for x
    x = 64,205,905.34/6,668.32
  6. Step 6: Final answer
    x = 9,628.50

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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.