Home / 20,935.80-28,886.40-11,861.34

Finding the Fourth Proportional to 20,935.80, 28,886.40 and 11,861.34

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Solution

The fourth proportional to 20,935.80, 28,886.40 and 11,861.34 is: 16,365.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.80 : 28,886.40 = 11,861.34 : x
  2. Step 2: Convert to fraction form
    20,935.80/28,886.40 = 11,861.34/x
  3. Step 3: Cross multiply
    20,935.80x = 28,886.40 × 11,861.34
  4. Step 4: Simplify right side
    20,935.80x = 342,631,411.78
  5. Step 5: Solve for x
    x = 342,631,411.78/20,935.80
  6. Step 6: Final answer
    x = 16,365.81

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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.