Home / 28,494-39,321.72-15,921.72

Finding the Fourth Proportional to 28,494, 39,321.72 and 15,921.72

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Solution

The fourth proportional to 28,494, 39,321.72 and 15,921.72 is: 21,971.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,494 : 39,321.72 = 15,921.72 : x
  2. Step 2: Convert to fraction form
    28,494/39,321.72 = 15,921.72/x
  3. Step 3: Cross multiply
    28,494x = 39,321.72 × 15,921.72
  4. Step 4: Simplify right side
    28,494x = 626,069,415.76
  5. Step 5: Solve for x
    x = 626,069,415.76/28,494
  6. Step 6: Final answer
    x = 21,971.97

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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.