Home / 28,144.98-38,840.31-15,570.54

Finding the Fourth Proportional to 28,144.98, 38,840.31 and 15,570.54

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Solution

The fourth proportional to 28,144.98, 38,840.31 and 15,570.54 is: 21,487.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,144.98 : 38,840.31 = 15,570.54 : x
  2. Step 2: Convert to fraction form
    28,144.98/38,840.31 = 15,570.54/x
  3. Step 3: Cross multiply
    28,144.98x = 38,840.31 × 15,570.54
  4. Step 4: Simplify right side
    28,144.98x = 604,764,600.47
  5. Step 5: Solve for x
    x = 604,764,600.47/28,144.98
  6. Step 6: Final answer
    x = 21,487.48

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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.