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Finding the Fourth Proportional to 13,806.67, 20,807.17 and 12,492.19

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Solution

The fourth proportional to 13,806.67, 20,807.17 and 12,492.19 is: 18,826.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,806.67 : 20,807.17 = 12,492.19 : x
  2. Step 2: Convert to fraction form
    13,806.67/20,807.17 = 12,492.19/x
  3. Step 3: Cross multiply
    13,806.67x = 20,807.17 × 12,492.19
  4. Step 4: Simplify right side
    13,806.67x = 259,927,121.00
  5. Step 5: Solve for x
    x = 259,927,121.00/13,806.67
  6. Step 6: Final answer
    x = 18,826.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.