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Finding the Fourth Proportional to 19,659.60, 29,431.80 and 17,355.60

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Solution

The fourth proportional to 19,659.60, 29,431.80 and 17,355.60 is: 25,982.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.60 : 29,431.80 = 17,355.60 : x
  2. Step 2: Convert to fraction form
    19,659.60/29,431.80 = 17,355.60/x
  3. Step 3: Cross multiply
    19,659.60x = 29,431.80 × 17,355.60
  4. Step 4: Simplify right side
    19,659.60x = 510,806,548.08
  5. Step 5: Solve for x
    x = 510,806,548.08/19,659.60
  6. Step 6: Final answer
    x = 25,982.55

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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.