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Finding the Fourth Proportional to 19,145.04, 28,737 and 13,604.64

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Solution

The fourth proportional to 19,145.04, 28,737 and 13,604.64 is: 20,420.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.04 : 28,737 = 13,604.64 : x
  2. Step 2: Convert to fraction form
    19,145.04/28,737 = 13,604.64/x
  3. Step 3: Cross multiply
    19,145.04x = 28,737 × 13,604.64
  4. Step 4: Simplify right side
    19,145.04x = 390,956,539.68
  5. Step 5: Solve for x
    x = 390,956,539.68/19,145.04
  6. Step 6: Final answer
    x = 20,420.77

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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.