Home / 13,137.54-18,128.57-7,831.30

Finding the Fourth Proportional to 13,137.54, 18,128.57 and 7,831.30

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Solution

The fourth proportional to 13,137.54, 18,128.57 and 7,831.30 is: 10,806.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.54 : 18,128.57 = 7,831.30 : x
  2. Step 2: Convert to fraction form
    13,137.54/18,128.57 = 7,831.30/x
  3. Step 3: Cross multiply
    13,137.54x = 18,128.57 × 7,831.30
  4. Step 4: Simplify right side
    13,137.54x = 141,970,270.24
  5. Step 5: Solve for x
    x = 141,970,270.24/13,137.54
  6. Step 6: Final answer
    x = 10,806.46

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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.