Home / 20,687.00-28,531.44-13,516.34

Finding the Fourth Proportional to 20,687.00, 28,531.44 and 13,516.34

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Solution

The fourth proportional to 20,687.00, 28,531.44 and 13,516.34 is: 18,641.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.00 : 28,531.44 = 13,516.34 : x
  2. Step 2: Convert to fraction form
    20,687.00/28,531.44 = 13,516.34/x
  3. Step 3: Cross multiply
    20,687.00x = 28,531.44 × 13,516.34
  4. Step 4: Simplify right side
    20,687.00x = 385,640,501.07
  5. Step 5: Solve for x
    x = 385,640,501.07/20,687.00
  6. Step 6: Final answer
    x = 18,641.69

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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.