Home / 20,831.47-28,747.31-11,271.34

Finding the Fourth Proportional to 20,831.47, 28,747.31 and 11,271.34

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Solution

The fourth proportional to 20,831.47, 28,747.31 and 11,271.34 is: 15,554.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.47 : 28,747.31 = 11,271.34 : x
  2. Step 2: Convert to fraction form
    20,831.47/28,747.31 = 11,271.34/x
  3. Step 3: Cross multiply
    20,831.47x = 28,747.31 × 11,271.34
  4. Step 4: Simplify right side
    20,831.47x = 324,020,661.41
  5. Step 5: Solve for x
    x = 324,020,661.41/20,831.47
  6. Step 6: Final answer
    x = 15,554.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.