Home / 20,188.10-30,300.15-11,857.70

Finding the Fourth Proportional to 20,188.10, 30,300.15 and 11,857.70

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Solution

The fourth proportional to 20,188.10, 30,300.15 and 11,857.70 is: 17,797.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188.10 : 30,300.15 = 11,857.70 : x
  2. Step 2: Convert to fraction form
    20,188.10/30,300.15 = 11,857.70/x
  3. Step 3: Cross multiply
    20,188.10x = 30,300.15 × 11,857.70
  4. Step 4: Simplify right side
    20,188.10x = 359,290,088.66
  5. Step 5: Solve for x
    x = 359,290,088.66/20,188.10
  6. Step 6: Final answer
    x = 17,797.12

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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.