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Finding the Fourth Proportional to 18,697.45, 27,980.33 and 11,680.76

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Solution

The fourth proportional to 18,697.45, 27,980.33 and 11,680.76 is: 17,480.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.45 : 27,980.33 = 11,680.76 : x
  2. Step 2: Convert to fraction form
    18,697.45/27,980.33 = 11,680.76/x
  3. Step 3: Cross multiply
    18,697.45x = 27,980.33 × 11,680.76
  4. Step 4: Simplify right side
    18,697.45x = 326,831,519.45
  5. Step 5: Solve for x
    x = 326,831,519.45/18,697.45
  6. Step 6: Final answer
    x = 17,480.00

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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.