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Finding the Fourth Proportional to 28,503.99, 42,756.08 and 16,809

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Solution

The fourth proportional to 28,503.99, 42,756.08 and 16,809 is: 25,213.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,503.99 : 42,756.08 = 16,809 : x
  2. Step 2: Convert to fraction form
    28,503.99/42,756.08 = 16,809/x
  3. Step 3: Cross multiply
    28,503.99x = 42,756.08 × 16,809
  4. Step 4: Simplify right side
    28,503.99x = 718,686,864.68
  5. Step 5: Solve for x
    x = 718,686,864.68/28,503.99
  6. Step 6: Final answer
    x = 25,213.55

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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.