Home / 11,981.63-17,980.45-4,190.45

Finding the Fourth Proportional to 11,981.63, 17,980.45 and 4,190.45

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Solution

The fourth proportional to 11,981.63, 17,980.45 and 4,190.45 is: 6,288.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,981.63 : 17,980.45 = 4,190.45 : x
  2. Step 2: Convert to fraction form
    11,981.63/17,980.45 = 4,190.45/x
  3. Step 3: Cross multiply
    11,981.63x = 17,980.45 × 4,190.45
  4. Step 4: Simplify right side
    11,981.63x = 75,346,076.32
  5. Step 5: Solve for x
    x = 75,346,076.32/11,981.63
  6. Step 6: Final answer
    x = 6,288.46

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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.