Home / 20,556.47-30,805.18-11,678.87

Finding the Fourth Proportional to 20,556.47, 30,805.18 and 11,678.87

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Solution

The fourth proportional to 20,556.47, 30,805.18 and 11,678.87 is: 17,501.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.47 : 30,805.18 = 11,678.87 : x
  2. Step 2: Convert to fraction form
    20,556.47/30,805.18 = 11,678.87/x
  3. Step 3: Cross multiply
    20,556.47x = 30,805.18 × 11,678.87
  4. Step 4: Simplify right side
    20,556.47x = 359,769,509.32
  5. Step 5: Solve for x
    x = 359,769,509.32/20,556.47
  6. Step 6: Final answer
    x = 17,501.53

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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.