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Finding the Fourth Proportional to 19,071.80, 26,320.80 and 11,520.44

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Solution

The fourth proportional to 19,071.80, 26,320.80 and 11,520.44 is: 15,899.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,071.80 : 26,320.80 = 11,520.44 : x
  2. Step 2: Convert to fraction form
    19,071.80/26,320.80 = 11,520.44/x
  3. Step 3: Cross multiply
    19,071.80x = 26,320.80 × 11,520.44
  4. Step 4: Simplify right side
    19,071.80x = 303,227,197.15
  5. Step 5: Solve for x
    x = 303,227,197.15/19,071.80
  6. Step 6: Final answer
    x = 15,899.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.