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Finding the Fourth Proportional to 19,403.30, 29,099.19 and 15,515.30

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Solution

The fourth proportional to 19,403.30, 29,099.19 and 15,515.30 is: 23,268.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,403.30 : 29,099.19 = 15,515.30 : x
  2. Step 2: Convert to fraction form
    19,403.30/29,099.19 = 15,515.30/x
  3. Step 3: Cross multiply
    19,403.30x = 29,099.19 × 15,515.30
  4. Step 4: Simplify right side
    19,403.30x = 451,482,662.61
  5. Step 5: Solve for x
    x = 451,482,662.61/19,403.30
  6. Step 6: Final answer
    x = 23,268.34

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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.