Home / 21,822.22-30,114.70-12,390.79

Finding the Fourth Proportional to 21,822.22, 30,114.70 and 12,390.79

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Solution

The fourth proportional to 21,822.22, 30,114.70 and 12,390.79 is: 17,099.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,822.22 : 30,114.70 = 12,390.79 : x
  2. Step 2: Convert to fraction form
    21,822.22/30,114.70 = 12,390.79/x
  3. Step 3: Cross multiply
    21,822.22x = 30,114.70 × 12,390.79
  4. Step 4: Simplify right side
    21,822.22x = 373,144,764.19
  5. Step 5: Solve for x
    x = 373,144,764.19/21,822.22
  6. Step 6: Final answer
    x = 17,099.30

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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.