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Finding the Fourth Proportional to 20,703.99, 28,570.08 and 11,751.66

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Solution

The fourth proportional to 20,703.99, 28,570.08 and 11,751.66 is: 16,216.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.99 : 28,570.08 = 11,751.66 : x
  2. Step 2: Convert to fraction form
    20,703.99/28,570.08 = 11,751.66/x
  3. Step 3: Cross multiply
    20,703.99x = 28,570.08 × 11,751.66
  4. Step 4: Simplify right side
    20,703.99x = 335,745,866.33
  5. Step 5: Solve for x
    x = 335,745,866.33/20,703.99
  6. Step 6: Final answer
    x = 16,216.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.