Home / 15,801.32-21,845.22-13,831.40

Finding the Fourth Proportional to 15,801.32, 21,845.22 and 13,831.40

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Solution

The fourth proportional to 15,801.32, 21,845.22 and 13,831.40 is: 19,121.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,801.32 : 21,845.22 = 13,831.40 : x
  2. Step 2: Convert to fraction form
    15,801.32/21,845.22 = 13,831.40/x
  3. Step 3: Cross multiply
    15,801.32x = 21,845.22 × 13,831.40
  4. Step 4: Simplify right side
    15,801.32x = 302,149,975.91
  5. Step 5: Solve for x
    x = 302,149,975.91/15,801.32
  6. Step 6: Final answer
    x = 19,121.82

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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.