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Finding the Fourth Proportional to 20,969.99, 28,938.36 and 11,410.17

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Solution

The fourth proportional to 20,969.99, 28,938.36 and 11,410.17 is: 15,745.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.99 : 28,938.36 = 11,410.17 : x
  2. Step 2: Convert to fraction form
    20,969.99/28,938.36 = 11,410.17/x
  3. Step 3: Cross multiply
    20,969.99x = 28,938.36 × 11,410.17
  4. Step 4: Simplify right side
    20,969.99x = 330,191,607.12
  5. Step 5: Solve for x
    x = 330,191,607.12/20,969.99
  6. Step 6: Final answer
    x = 15,745.91

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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.