Home / 21,940.43-30,269.18-12,984.67

Finding the Fourth Proportional to 21,940.43, 30,269.18 and 12,984.67

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Solution

The fourth proportional to 21,940.43, 30,269.18 and 12,984.67 is: 17,913.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.43 : 30,269.18 = 12,984.67 : x
  2. Step 2: Convert to fraction form
    21,940.43/30,269.18 = 12,984.67/x
  3. Step 3: Cross multiply
    21,940.43x = 30,269.18 × 12,984.67
  4. Step 4: Simplify right side
    21,940.43x = 393,035,313.47
  5. Step 5: Solve for x
    x = 393,035,313.47/21,940.43
  6. Step 6: Final answer
    x = 17,913.75

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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.