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Finding the Fourth Proportional to 19,010.79, 28,516.20 and 5,159.79

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Solution

The fourth proportional to 19,010.79, 28,516.20 and 5,159.79 is: 7,739.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,010.79 : 28,516.20 = 5,159.79 : x
  2. Step 2: Convert to fraction form
    19,010.79/28,516.20 = 5,159.79/x
  3. Step 3: Cross multiply
    19,010.79x = 28,516.20 × 5,159.79
  4. Step 4: Simplify right side
    19,010.79x = 147,137,603.60
  5. Step 5: Solve for x
    x = 147,137,603.60/19,010.79
  6. Step 6: Final answer
    x = 7,739.69

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Similar ratio
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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.