Home / 21,870.36-30,183.64-12,440.32

Finding the Fourth Proportional to 21,870.36, 30,183.64 and 12,440.32

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Solution

The fourth proportional to 21,870.36, 30,183.64 and 12,440.32 is: 17,169.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.36 : 30,183.64 = 12,440.32 : x
  2. Step 2: Convert to fraction form
    21,870.36/30,183.64 = 12,440.32/x
  3. Step 3: Cross multiply
    21,870.36x = 30,183.64 × 12,440.32
  4. Step 4: Simplify right side
    21,870.36x = 375,494,140.36
  5. Step 5: Solve for x
    x = 375,494,140.36/21,870.36
  6. Step 6: Final answer
    x = 17,169.09

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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.