Home / 21,984.87-30,336.69-12,423.75

Finding the Fourth Proportional to 21,984.87, 30,336.69 and 12,423.75

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Solution

The fourth proportional to 21,984.87, 30,336.69 and 12,423.75 is: 17,143.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.87 : 30,336.69 = 12,423.75 : x
  2. Step 2: Convert to fraction form
    21,984.87/30,336.69 = 12,423.75/x
  3. Step 3: Cross multiply
    21,984.87x = 30,336.69 × 12,423.75
  4. Step 4: Simplify right side
    21,984.87x = 376,895,452.39
  5. Step 5: Solve for x
    x = 376,895,452.39/21,984.87
  6. Step 6: Final answer
    x = 17,143.40

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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.