Home / 20,831.84-28,749.60-12,765.44

Finding the Fourth Proportional to 20,831.84, 28,749.60 and 12,765.44

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Solution

The fourth proportional to 20,831.84, 28,749.60 and 12,765.44 is: 17,617.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.84 : 28,749.60 = 12,765.44 : x
  2. Step 2: Convert to fraction form
    20,831.84/28,749.60 = 12,765.44/x
  3. Step 3: Cross multiply
    20,831.84x = 28,749.60 × 12,765.44
  4. Step 4: Simplify right side
    20,831.84x = 367,001,293.82
  5. Step 5: Solve for x
    x = 367,001,293.82/20,831.84
  6. Step 6: Final answer
    x = 17,617.32

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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.