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Finding the Fourth Proportional to 19,008.79, 28,513.20 and 5,157.79

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Solution

The fourth proportional to 19,008.79, 28,513.20 and 5,157.79 is: 7,736.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,008.79 : 28,513.20 = 5,157.79 : x
  2. Step 2: Convert to fraction form
    19,008.79/28,513.20 = 5,157.79/x
  3. Step 3: Cross multiply
    19,008.79x = 28,513.20 × 5,157.79
  4. Step 4: Simplify right side
    19,008.79x = 147,065,097.83
  5. Step 5: Solve for x
    x = 147,065,097.83/19,008.79
  6. Step 6: Final answer
    x = 7,736.69

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Double scale
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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.