Home / 28,157.88-42,203.11-13,144.80

Finding the Fourth Proportional to 28,157.88, 42,203.11 and 13,144.80

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Solution

The fourth proportional to 28,157.88, 42,203.11 and 13,144.80 is: 19,701.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.88 : 42,203.11 = 13,144.80 : x
  2. Step 2: Convert to fraction form
    28,157.88/42,203.11 = 13,144.80/x
  3. Step 3: Cross multiply
    28,157.88x = 42,203.11 × 13,144.80
  4. Step 4: Simplify right side
    28,157.88x = 554,751,440.33
  5. Step 5: Solve for x
    x = 554,751,440.33/28,157.88
  6. Step 6: Final answer
    x = 19,701.46

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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.