Home / 20,489.99-28,276.70-11,537.82

Finding the Fourth Proportional to 20,489.99, 28,276.70 and 11,537.82

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Solution

The fourth proportional to 20,489.99, 28,276.70 and 11,537.82 is: 15,922.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.99 : 28,276.70 = 11,537.82 : x
  2. Step 2: Convert to fraction form
    20,489.99/28,276.70 = 11,537.82/x
  3. Step 3: Cross multiply
    20,489.99x = 28,276.70 × 11,537.82
  4. Step 4: Simplify right side
    20,489.99x = 326,251,417.10
  5. Step 5: Solve for x
    x = 326,251,417.10/20,489.99
  6. Step 6: Final answer
    x = 15,922.48

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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.