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Finding the Fourth Proportional to 19,826.20, 29,697.90 and 9,305.20

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Solution

The fourth proportional to 19,826.20, 29,697.90 and 9,305.20 is: 13,938.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,826.20 : 29,697.90 = 9,305.20 : x
  2. Step 2: Convert to fraction form
    19,826.20/29,697.90 = 9,305.20/x
  3. Step 3: Cross multiply
    19,826.20x = 29,697.90 × 9,305.20
  4. Step 4: Simplify right side
    19,826.20x = 276,344,899.08
  5. Step 5: Solve for x
    x = 276,344,899.08/19,826.20
  6. Step 6: Final answer
    x = 13,938.37

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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.