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Finding the Fourth Proportional to 17,980.20, 26,986.30 and 10,575.40

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Solution

The fourth proportional to 17,980.20, 26,986.30 and 10,575.40 is: 15,872.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,980.20 : 26,986.30 = 10,575.40 : x
  2. Step 2: Convert to fraction form
    17,980.20/26,986.30 = 10,575.40/x
  3. Step 3: Cross multiply
    17,980.20x = 26,986.30 × 10,575.40
  4. Step 4: Simplify right side
    17,980.20x = 285,390,917.02
  5. Step 5: Solve for x
    x = 285,390,917.02/17,980.20
  6. Step 6: Final answer
    x = 15,872.51

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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.