Home / 20,895.36-28,820.76-13,831.38

Finding the Fourth Proportional to 20,895.36, 28,820.76 and 13,831.38

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Solution

The fourth proportional to 20,895.36, 28,820.76 and 13,831.38 is: 19,077.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,895.36 : 28,820.76 = 13,831.38 : x
  2. Step 2: Convert to fraction form
    20,895.36/28,820.76 = 13,831.38/x
  3. Step 3: Cross multiply
    20,895.36x = 28,820.76 × 13,831.38
  4. Step 4: Simplify right side
    20,895.36x = 398,630,883.45
  5. Step 5: Solve for x
    x = 398,630,883.45/20,895.36
  6. Step 6: Final answer
    x = 19,077.48

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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.