Home / 13,647.03-18,831.38-7,680.75

Finding the Fourth Proportional to 13,647.03, 18,831.38 and 7,680.75

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Solution

The fourth proportional to 13,647.03, 18,831.38 and 7,680.75 is: 10,598.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,647.03 : 18,831.38 = 7,680.75 : x
  2. Step 2: Convert to fraction form
    13,647.03/18,831.38 = 7,680.75/x
  3. Step 3: Cross multiply
    13,647.03x = 18,831.38 × 7,680.75
  4. Step 4: Simplify right side
    13,647.03x = 144,639,083.53
  5. Step 5: Solve for x
    x = 144,639,083.53/13,647.03
  6. Step 6: Final answer
    x = 10,598.58

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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.