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Finding the Fourth Proportional to 20,403.64, 30,614.64 and 11,032.72

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Solution

The fourth proportional to 20,403.64, 30,614.64 and 11,032.72 is: 16,554.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.64 : 30,614.64 = 11,032.72 : x
  2. Step 2: Convert to fraction form
    20,403.64/30,614.64 = 11,032.72/x
  3. Step 3: Cross multiply
    20,403.64x = 30,614.64 × 11,032.72
  4. Step 4: Simplify right side
    20,403.64x = 337,762,751.02
  5. Step 5: Solve for x
    x = 337,762,751.02/20,403.64
  6. Step 6: Final answer
    x = 16,554.04

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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.