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Finding the Fourth Proportional to 6,430, 8,873.40 and 3,946

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Solution

The fourth proportional to 6,430, 8,873.40 and 3,946 is: 5,445.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,430 : 8,873.40 = 3,946 : x
  2. Step 2: Convert to fraction form
    6,430/8,873.40 = 3,946/x
  3. Step 3: Cross multiply
    6,430x = 8,873.40 × 3,946
  4. Step 4: Simplify right side
    6,430x = 35,014,436.40
  5. Step 5: Solve for x
    x = 35,014,436.40/6,430
  6. Step 6: Final answer
    x = 5,445.48

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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.