Home / 19,301.36-28,965-8,913.20

Finding the Fourth Proportional to 19,301.36, 28,965 and 8,913.20

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Solution

The fourth proportional to 19,301.36, 28,965 and 8,913.20 is: 13,375.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,301.36 : 28,965 = 8,913.20 : x
  2. Step 2: Convert to fraction form
    19,301.36/28,965 = 8,913.20/x
  3. Step 3: Cross multiply
    19,301.36x = 28,965 × 8,913.20
  4. Step 4: Simplify right side
    19,301.36x = 258,170,838.00
  5. Step 5: Solve for x
    x = 258,170,838.00/19,301.36
  6. Step 6: Final answer
    x = 13,375.78

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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.