Home / 28,376.72-39,159.52-15,629.64

Finding the Fourth Proportional to 28,376.72, 39,159.52 and 15,629.64

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Solution

The fourth proportional to 28,376.72, 39,159.52 and 15,629.64 is: 21,568.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,376.72 : 39,159.52 = 15,629.64 : x
  2. Step 2: Convert to fraction form
    28,376.72/39,159.52 = 15,629.64/x
  3. Step 3: Cross multiply
    28,376.72x = 39,159.52 × 15,629.64
  4. Step 4: Simplify right side
    28,376.72x = 612,049,200.17
  5. Step 5: Solve for x
    x = 612,049,200.17/28,376.72
  6. Step 6: Final answer
    x = 21,568.71

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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.