Home / 21,778.90-30,054.60-12,346.85

Finding the Fourth Proportional to 21,778.90, 30,054.60 and 12,346.85

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Solution

The fourth proportional to 21,778.90, 30,054.60 and 12,346.85 is: 17,038.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.90 : 30,054.60 = 12,346.85 : x
  2. Step 2: Convert to fraction form
    21,778.90/30,054.60 = 12,346.85/x
  3. Step 3: Cross multiply
    21,778.90x = 30,054.60 × 12,346.85
  4. Step 4: Simplify right side
    21,778.90x = 371,079,713.15
  5. Step 5: Solve for x
    x = 371,079,713.15/21,778.90
  6. Step 6: Final answer
    x = 17,038.50

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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.