Home / 21,984.97-30,340.74-12,421.54

Finding the Fourth Proportional to 21,984.97, 30,340.74 and 12,421.54

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Solution

The fourth proportional to 21,984.97, 30,340.74 and 12,421.54 is: 17,142.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.97 : 30,340.74 = 12,421.54 : x
  2. Step 2: Convert to fraction form
    21,984.97/30,340.74 = 12,421.54/x
  3. Step 3: Cross multiply
    21,984.97x = 30,340.74 × 12,421.54
  4. Step 4: Simplify right side
    21,984.97x = 376,878,715.54
  5. Step 5: Solve for x
    x = 376,878,715.54/21,984.97
  6. Step 6: Final answer
    x = 17,142.56

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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.