Home / 20,539.09-28,343.82-11,107.63

Finding the Fourth Proportional to 20,539.09, 28,343.82 and 11,107.63

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Solution

The fourth proportional to 20,539.09, 28,343.82 and 11,107.63 is: 15,328.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.09 : 28,343.82 = 11,107.63 : x
  2. Step 2: Convert to fraction form
    20,539.09/28,343.82 = 11,107.63/x
  3. Step 3: Cross multiply
    20,539.09x = 28,343.82 × 11,107.63
  4. Step 4: Simplify right side
    20,539.09x = 314,832,665.35
  5. Step 5: Solve for x
    x = 314,832,665.35/20,539.09
  6. Step 6: Final answer
    x = 15,328.46

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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.