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Finding the Fourth Proportional to 20,673.80, 30,999.18 and 7,526.60

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Solution

The fourth proportional to 20,673.80, 30,999.18 and 7,526.60 is: 11,285.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.80 : 30,999.18 = 7,526.60 : x
  2. Step 2: Convert to fraction form
    20,673.80/30,999.18 = 7,526.60/x
  3. Step 3: Cross multiply
    20,673.80x = 30,999.18 × 7,526.60
  4. Step 4: Simplify right side
    20,673.80x = 233,318,428.19
  5. Step 5: Solve for x
    x = 233,318,428.19/20,673.80
  6. Step 6: Final answer
    x = 11,285.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.