Home / 21,883.22-30,191.73-12,930.98

Finding the Fourth Proportional to 21,883.22, 30,191.73 and 12,930.98

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Solution

The fourth proportional to 21,883.22, 30,191.73 and 12,930.98 is: 17,840.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,883.22 : 30,191.73 = 12,930.98 : x
  2. Step 2: Convert to fraction form
    21,883.22/30,191.73 = 12,930.98/x
  3. Step 3: Cross multiply
    21,883.22x = 30,191.73 × 12,930.98
  4. Step 4: Simplify right side
    21,883.22x = 390,408,656.80
  5. Step 5: Solve for x
    x = 390,408,656.80/21,883.22
  6. Step 6: Final answer
    x = 17,840.55

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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.