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Finding the Fourth Proportional to 19,036.42, 28,554.63 and 5,185.42

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Solution

The fourth proportional to 19,036.42, 28,554.63 and 5,185.42 is: 7,778.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,036.42 : 28,554.63 = 5,185.42 : x
  2. Step 2: Convert to fraction form
    19,036.42/28,554.63 = 5,185.42/x
  3. Step 3: Cross multiply
    19,036.42x = 28,554.63 × 5,185.42
  4. Step 4: Simplify right side
    19,036.42x = 148,067,749.49
  5. Step 5: Solve for x
    x = 148,067,749.49/19,036.42
  6. Step 6: Final answer
    x = 7,778.13

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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.