Home / 28,420.26-39,215.43-15,845.10

Finding the Fourth Proportional to 28,420.26, 39,215.43 and 15,845.10

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Solution

The fourth proportional to 28,420.26, 39,215.43 and 15,845.10 is: 21,863.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.26 : 39,215.43 = 15,845.10 : x
  2. Step 2: Convert to fraction form
    28,420.26/39,215.43 = 15,845.10/x
  3. Step 3: Cross multiply
    28,420.26x = 39,215.43 × 15,845.10
  4. Step 4: Simplify right side
    28,420.26x = 621,372,409.89
  5. Step 5: Solve for x
    x = 621,372,409.89/28,420.26
  6. Step 6: Final answer
    x = 21,863.71

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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.