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Finding the Fourth Proportional to 9,955.96, 13,734.61 and 6,420.31

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Solution

The fourth proportional to 9,955.96, 13,734.61 and 6,420.31 is: 8,857.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,955.96 : 13,734.61 = 6,420.31 : x
  2. Step 2: Convert to fraction form
    9,955.96/13,734.61 = 6,420.31/x
  3. Step 3: Cross multiply
    9,955.96x = 13,734.61 × 6,420.31
  4. Step 4: Simplify right side
    9,955.96x = 88,180,403.54
  5. Step 5: Solve for x
    x = 88,180,403.54/9,955.96
  6. Step 6: Final answer
    x = 8,857.05

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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.