Home / 21,745.46-30,004.62-20,638.19

Finding the Fourth Proportional to 21,745.46, 30,004.62 and 20,638.19

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Solution

The fourth proportional to 21,745.46, 30,004.62 and 20,638.19 is: 28,476.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.46 : 30,004.62 = 20,638.19 : x
  2. Step 2: Convert to fraction form
    21,745.46/30,004.62 = 20,638.19/x
  3. Step 3: Cross multiply
    21,745.46x = 30,004.62 × 20,638.19
  4. Step 4: Simplify right side
    21,745.46x = 619,241,048.44
  5. Step 5: Solve for x
    x = 619,241,048.44/21,745.46
  6. Step 6: Final answer
    x = 28,476.80

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Half scale
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Double scale
Find fourth proportional to 21,746.46, 30,006 and 20,639.19
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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.