Home / 20,239.36-30,360.48-6,388

Finding the Fourth Proportional to 20,239.36, 30,360.48 and 6,388

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Solution

The fourth proportional to 20,239.36, 30,360.48 and 6,388 is: 9,582.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.36 : 30,360.48 = 6,388 : x
  2. Step 2: Convert to fraction form
    20,239.36/30,360.48 = 6,388/x
  3. Step 3: Cross multiply
    20,239.36x = 30,360.48 × 6,388
  4. Step 4: Simplify right side
    20,239.36x = 193,942,746.24
  5. Step 5: Solve for x
    x = 193,942,746.24/20,239.36
  6. Step 6: Final answer
    x = 9,582.45

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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.