Home / 20,952.08-31,420.20-10,556.72

Finding the Fourth Proportional to 20,952.08, 31,420.20 and 10,556.72

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Solution

The fourth proportional to 20,952.08, 31,420.20 and 10,556.72 is: 15,831.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.08 : 31,420.20 = 10,556.72 : x
  2. Step 2: Convert to fraction form
    20,952.08/31,420.20 = 10,556.72/x
  3. Step 3: Cross multiply
    20,952.08x = 31,420.20 × 10,556.72
  4. Step 4: Simplify right side
    20,952.08x = 331,694,253.74
  5. Step 5: Solve for x
    x = 331,694,253.74/20,952.08
  6. Step 6: Final answer
    x = 15,831.09

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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.