Home / 20,600.98-28,427.25-12,643.54

Finding the Fourth Proportional to 20,600.98, 28,427.25 and 12,643.54

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Solution

The fourth proportional to 20,600.98, 28,427.25 and 12,643.54 is: 17,446.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.98 : 28,427.25 = 12,643.54 : x
  2. Step 2: Convert to fraction form
    20,600.98/28,427.25 = 12,643.54/x
  3. Step 3: Cross multiply
    20,600.98x = 28,427.25 × 12,643.54
  4. Step 4: Simplify right side
    20,600.98x = 359,421,072.47
  5. Step 5: Solve for x
    x = 359,421,072.47/20,600.98
  6. Step 6: Final answer
    x = 17,446.79

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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.