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Finding the Fourth Proportional to 20,471.88, 30,707.72 and 17,690.10

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Solution

The fourth proportional to 20,471.88, 30,707.72 and 17,690.10 is: 26,535.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.88 : 30,707.72 = 17,690.10 : x
  2. Step 2: Convert to fraction form
    20,471.88/30,707.72 = 17,690.10/x
  3. Step 3: Cross multiply
    20,471.88x = 30,707.72 × 17,690.10
  4. Step 4: Simplify right side
    20,471.88x = 543,222,549.12
  5. Step 5: Solve for x
    x = 543,222,549.12/20,471.88
  6. Step 6: Final answer
    x = 26,535.06

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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.