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Finding the Fourth Proportional to 9,261.60, 13,892.40 and 3,422.40

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Solution

The fourth proportional to 9,261.60, 13,892.40 and 3,422.40 is: 5,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,261.60 : 13,892.40 = 3,422.40 : x
  2. Step 2: Convert to fraction form
    9,261.60/13,892.40 = 3,422.40/x
  3. Step 3: Cross multiply
    9,261.60x = 13,892.40 × 3,422.40
  4. Step 4: Simplify right side
    9,261.60x = 47,545,349.76
  5. Step 5: Solve for x
    x = 47,545,349.76/9,261.60
  6. Step 6: Final answer
    x = 5,133.60

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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.