Home / 18,831.06-28,206.38-9,918.30

Finding the Fourth Proportional to 18,831.06, 28,206.38 and 9,918.30

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Solution

The fourth proportional to 18,831.06, 28,206.38 and 9,918.30 is: 14,856.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.06 : 28,206.38 = 9,918.30 : x
  2. Step 2: Convert to fraction form
    18,831.06/28,206.38 = 9,918.30/x
  3. Step 3: Cross multiply
    18,831.06x = 28,206.38 × 9,918.30
  4. Step 4: Simplify right side
    18,831.06x = 279,759,338.75
  5. Step 5: Solve for x
    x = 279,759,338.75/18,831.06
  6. Step 6: Final answer
    x = 14,856.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.