Home / 21,010.80-28,999.85-13,059.03

Finding the Fourth Proportional to 21,010.80, 28,999.85 and 13,059.03

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Solution

The fourth proportional to 21,010.80, 28,999.85 and 13,059.03 is: 18,024.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.80 : 28,999.85 = 13,059.03 : x
  2. Step 2: Convert to fraction form
    21,010.80/28,999.85 = 13,059.03/x
  3. Step 3: Cross multiply
    21,010.80x = 28,999.85 × 13,059.03
  4. Step 4: Simplify right side
    21,010.80x = 378,709,845.85
  5. Step 5: Solve for x
    x = 378,709,845.85/21,010.80
  6. Step 6: Final answer
    x = 18,024.53

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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.