Home / 20,986.23-28,951.81-13,806.92

Finding the Fourth Proportional to 20,986.23, 28,951.81 and 13,806.92

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Solution

The fourth proportional to 20,986.23, 28,951.81 and 13,806.92 is: 19,047.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.23 : 28,951.81 = 13,806.92 : x
  2. Step 2: Convert to fraction form
    20,986.23/28,951.81 = 13,806.92/x
  3. Step 3: Cross multiply
    20,986.23x = 28,951.81 × 13,806.92
  4. Step 4: Simplify right side
    20,986.23x = 399,735,362.39
  5. Step 5: Solve for x
    x = 399,735,362.39/20,986.23
  6. Step 6: Final answer
    x = 19,047.50

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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.