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Finding the Fourth Proportional to 18,699.39, 28,048.77 and 10,813.77

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Solution

The fourth proportional to 18,699.39, 28,048.77 and 10,813.77 is: 16,220.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.39 : 28,048.77 = 10,813.77 : x
  2. Step 2: Convert to fraction form
    18,699.39/28,048.77 = 10,813.77/x
  3. Step 3: Cross multiply
    18,699.39x = 28,048.77 × 10,813.77
  4. Step 4: Simplify right side
    18,699.39x = 303,312,947.56
  5. Step 5: Solve for x
    x = 303,312,947.56/18,699.39
  6. Step 6: Final answer
    x = 16,220.47

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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.