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Finding the Fourth Proportional to 18,697.16, 28,050.78 and 6,219.20

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Solution

The fourth proportional to 18,697.16, 28,050.78 and 6,219.20 is: 9,330.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.16 : 28,050.78 = 6,219.20 : x
  2. Step 2: Convert to fraction form
    18,697.16/28,050.78 = 6,219.20/x
  3. Step 3: Cross multiply
    18,697.16x = 28,050.78 × 6,219.20
  4. Step 4: Simplify right side
    18,697.16x = 174,453,410.98
  5. Step 5: Solve for x
    x = 174,453,410.98/18,697.16
  6. Step 6: Final answer
    x = 9,330.48

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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.