Home / 20,504.31-30,756.44-15,831.11

Finding the Fourth Proportional to 20,504.31, 30,756.44 and 15,831.11

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Solution

The fourth proportional to 20,504.31, 30,756.44 and 15,831.11 is: 23,746.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,504.31 : 30,756.44 = 15,831.11 : x
  2. Step 2: Convert to fraction form
    20,504.31/30,756.44 = 15,831.11/x
  3. Step 3: Cross multiply
    20,504.31x = 30,756.44 × 15,831.11
  4. Step 4: Simplify right side
    20,504.31x = 486,908,701.32
  5. Step 5: Solve for x
    x = 486,908,701.32/20,504.31
  6. Step 6: Final answer
    x = 23,746.66

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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.