Home / 21,830.94-30,122.82-12,397.68

Finding the Fourth Proportional to 21,830.94, 30,122.82 and 12,397.68

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Solution

The fourth proportional to 21,830.94, 30,122.82 and 12,397.68 is: 17,106.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830.94 : 30,122.82 = 12,397.68 : x
  2. Step 2: Convert to fraction form
    21,830.94/30,122.82 = 12,397.68/x
  3. Step 3: Cross multiply
    21,830.94x = 30,122.82 × 12,397.68
  4. Step 4: Simplify right side
    21,830.94x = 373,453,083.06
  5. Step 5: Solve for x
    x = 373,453,083.06/21,830.94
  6. Step 6: Final answer
    x = 17,106.60

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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.