Home / 21,020.76-28,998.54-13,072.32

Finding the Fourth Proportional to 21,020.76, 28,998.54 and 13,072.32

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Solution

The fourth proportional to 21,020.76, 28,998.54 and 13,072.32 is: 18,033.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.76 : 28,998.54 = 13,072.32 : x
  2. Step 2: Convert to fraction form
    21,020.76/28,998.54 = 13,072.32/x
  3. Step 3: Cross multiply
    21,020.76x = 28,998.54 × 13,072.32
  4. Step 4: Simplify right side
    21,020.76x = 379,078,194.41
  5. Step 5: Solve for x
    x = 379,078,194.41/21,020.76
  6. Step 6: Final answer
    x = 18,033.52

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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.