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Finding the Fourth Proportional to 20,602.86, 28,435.50 and 11,653.14

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Solution

The fourth proportional to 20,602.86, 28,435.50 and 11,653.14 is: 16,083.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.86 : 28,435.50 = 11,653.14 : x
  2. Step 2: Convert to fraction form
    20,602.86/28,435.50 = 11,653.14/x
  3. Step 3: Cross multiply
    20,602.86x = 28,435.50 × 11,653.14
  4. Step 4: Simplify right side
    20,602.86x = 331,362,862.47
  5. Step 5: Solve for x
    x = 331,362,862.47/20,602.86
  6. Step 6: Final answer
    x = 16,083.34

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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.