Home / 28,575.96-39,431.52-15,827.64

Finding the Fourth Proportional to 28,575.96, 39,431.52 and 15,827.64

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Solution

The fourth proportional to 28,575.96, 39,431.52 and 15,827.64 is: 21,840.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,575.96 : 39,431.52 = 15,827.64 : x
  2. Step 2: Convert to fraction form
    28,575.96/39,431.52 = 15,827.64/x
  3. Step 3: Cross multiply
    28,575.96x = 39,431.52 × 15,827.64
  4. Step 4: Simplify right side
    28,575.96x = 624,107,903.21
  5. Step 5: Solve for x
    x = 624,107,903.21/28,575.96
  6. Step 6: Final answer
    x = 21,840.31

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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.