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Finding the Fourth Proportional to 20,998.30, 29,436.50 and 20,998.30

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Solution

The fourth proportional to 20,998.30, 29,436.50 and 20,998.30 is: 29,436.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.30 : 29,436.50 = 20,998.30 : x
  2. Step 2: Convert to fraction form
    20,998.30/29,436.50 = 20,998.30/x
  3. Step 3: Cross multiply
    20,998.30x = 29,436.50 × 20,998.30
  4. Step 4: Simplify right side
    20,998.30x = 618,116,457.95
  5. Step 5: Solve for x
    x = 618,116,457.95/20,998.30
  6. Step 6: Final answer
    x = 29,436.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.