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Finding the Fourth Proportional to 17,066.80, 25,619.40 and 13,188.40

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Solution

The fourth proportional to 17,066.80, 25,619.40 and 13,188.40 is: 19,797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,066.80 : 25,619.40 = 13,188.40 : x
  2. Step 2: Convert to fraction form
    17,066.80/25,619.40 = 13,188.40/x
  3. Step 3: Cross multiply
    17,066.80x = 25,619.40 × 13,188.40
  4. Step 4: Simplify right side
    17,066.80x = 337,878,894.96
  5. Step 5: Solve for x
    x = 337,878,894.96/17,066.80
  6. Step 6: Final answer
    x = 19,797.44

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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.