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Finding the Fourth Proportional to 6,680.40, 10,009.80 and 4,210.80

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Solution

The fourth proportional to 6,680.40, 10,009.80 and 4,210.80 is: 6,309.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,680.40 : 10,009.80 = 4,210.80 : x
  2. Step 2: Convert to fraction form
    6,680.40/10,009.80 = 4,210.80/x
  3. Step 3: Cross multiply
    6,680.40x = 10,009.80 × 4,210.80
  4. Step 4: Simplify right side
    6,680.40x = 42,149,265.84
  5. Step 5: Solve for x
    x = 42,149,265.84/6,680.40
  6. Step 6: Final answer
    x = 6,309.39

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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.