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Finding the Fourth Proportional to 19,004.20, 28,490.90 and 7,919.18

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Solution

The fourth proportional to 19,004.20, 28,490.90 and 7,919.18 is: 11,872.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,004.20 : 28,490.90 = 7,919.18 : x
  2. Step 2: Convert to fraction form
    19,004.20/28,490.90 = 7,919.18/x
  3. Step 3: Cross multiply
    19,004.20x = 28,490.90 × 7,919.18
  4. Step 4: Simplify right side
    19,004.20x = 225,624,565.46
  5. Step 5: Solve for x
    x = 225,624,565.46/19,004.20
  6. Step 6: Final answer
    x = 11,872.35

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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.