Home / 20,485.78-28,263.81-12,100.66

Finding the Fourth Proportional to 20,485.78, 28,263.81 and 12,100.66

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Solution

The fourth proportional to 20,485.78, 28,263.81 and 12,100.66 is: 16,695.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.78 : 28,263.81 = 12,100.66 : x
  2. Step 2: Convert to fraction form
    20,485.78/28,263.81 = 12,100.66/x
  3. Step 3: Cross multiply
    20,485.78x = 28,263.81 × 12,100.66
  4. Step 4: Simplify right side
    20,485.78x = 342,010,755.11
  5. Step 5: Solve for x
    x = 342,010,755.11/20,485.78
  6. Step 6: Final answer
    x = 16,695.03

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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.