Home / 20,040.60-29,984.10-13,128.60

Finding the Fourth Proportional to 20,040.60, 29,984.10 and 13,128.60

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Solution

The fourth proportional to 20,040.60, 29,984.10 and 13,128.60 is: 19,642.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,040.60 : 29,984.10 = 13,128.60 : x
  2. Step 2: Convert to fraction form
    20,040.60/29,984.10 = 13,128.60/x
  3. Step 3: Cross multiply
    20,040.60x = 29,984.10 × 13,128.60
  4. Step 4: Simplify right side
    20,040.60x = 393,649,255.26
  5. Step 5: Solve for x
    x = 393,649,255.26/20,040.60
  6. Step 6: Final answer
    x = 19,642.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.