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Finding the Fourth Proportional to 19,811, 29,679.42 and 9,938.72

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Solution

The fourth proportional to 19,811, 29,679.42 and 9,938.72 is: 14,889.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811 : 29,679.42 = 9,938.72 : x
  2. Step 2: Convert to fraction form
    19,811/29,679.42 = 9,938.72/x
  3. Step 3: Cross multiply
    19,811x = 29,679.42 × 9,938.72
  4. Step 4: Simplify right side
    19,811x = 294,975,445.14
  5. Step 5: Solve for x
    x = 294,975,445.14/19,811
  6. Step 6: Final answer
    x = 14,889.48

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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.