Home / 20,679.66-28,526.36-12,720.33

Finding the Fourth Proportional to 20,679.66, 28,526.36 and 12,720.33

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Solution

The fourth proportional to 20,679.66, 28,526.36 and 12,720.33 is: 17,546.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.66 : 28,526.36 = 12,720.33 : x
  2. Step 2: Convert to fraction form
    20,679.66/28,526.36 = 12,720.33/x
  3. Step 3: Cross multiply
    20,679.66x = 28,526.36 × 12,720.33
  4. Step 4: Simplify right side
    20,679.66x = 362,864,649.30
  5. Step 5: Solve for x
    x = 362,864,649.30/20,679.66
  6. Step 6: Final answer
    x = 17,546.93

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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.