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Finding the Fourth Proportional to 6,460.65, 8,905.56 and 4,221.39

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Solution

The fourth proportional to 6,460.65, 8,905.56 and 4,221.39 is: 5,818.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,460.65 : 8,905.56 = 4,221.39 : x
  2. Step 2: Convert to fraction form
    6,460.65/8,905.56 = 4,221.39/x
  3. Step 3: Cross multiply
    6,460.65x = 8,905.56 × 4,221.39
  4. Step 4: Simplify right side
    6,460.65x = 37,593,841.93
  5. Step 5: Solve for x
    x = 37,593,841.93/6,460.65
  6. Step 6: Final answer
    x = 5,818.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.