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Finding the Fourth Proportional to 19,226.90, 28,840.35 and 15,986.90

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Solution

The fourth proportional to 19,226.90, 28,840.35 and 15,986.90 is: 23,980.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,226.90 : 28,840.35 = 15,986.90 : x
  2. Step 2: Convert to fraction form
    19,226.90/28,840.35 = 15,986.90/x
  3. Step 3: Cross multiply
    19,226.90x = 28,840.35 × 15,986.90
  4. Step 4: Simplify right side
    19,226.90x = 461,067,791.42
  5. Step 5: Solve for x
    x = 461,067,791.42/19,226.90
  6. Step 6: Final answer
    x = 23,980.35

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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.