Home / 19,810.72-29,720.68-5,771.08

Finding the Fourth Proportional to 19,810.72, 29,720.68 and 5,771.08

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Solution

The fourth proportional to 19,810.72, 29,720.68 and 5,771.08 is: 8,657.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,810.72 : 29,720.68 = 5,771.08 : x
  2. Step 2: Convert to fraction form
    19,810.72/29,720.68 = 5,771.08/x
  3. Step 3: Cross multiply
    19,810.72x = 29,720.68 × 5,771.08
  4. Step 4: Simplify right side
    19,810.72x = 171,520,421.93
  5. Step 5: Solve for x
    x = 171,520,421.93/19,810.72
  6. Step 6: Final answer
    x = 8,657.96

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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.