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Finding the Fourth Proportional to 9,892.80, 13,652.39 and 5,416.74

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Solution

The fourth proportional to 9,892.80, 13,652.39 and 5,416.74 is: 7,475.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,892.80 : 13,652.39 = 5,416.74 : x
  2. Step 2: Convert to fraction form
    9,892.80/13,652.39 = 5,416.74/x
  3. Step 3: Cross multiply
    9,892.80x = 13,652.39 × 5,416.74
  4. Step 4: Simplify right side
    9,892.80x = 73,951,419.92
  5. Step 5: Solve for x
    x = 73,951,419.92/9,892.80
  6. Step 6: Final answer
    x = 7,475.28

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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.