Home / 28,705.72-39,614.37-15,785.54

Finding the Fourth Proportional to 28,705.72, 39,614.37 and 15,785.54

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Solution

The fourth proportional to 28,705.72, 39,614.37 and 15,785.54 is: 21,784.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,705.72 : 39,614.37 = 15,785.54 : x
  2. Step 2: Convert to fraction form
    28,705.72/39,614.37 = 15,785.54/x
  3. Step 3: Cross multiply
    28,705.72x = 39,614.37 × 15,785.54
  4. Step 4: Simplify right side
    28,705.72x = 625,334,222.21
  5. Step 5: Solve for x
    x = 625,334,222.21/28,705.72
  6. Step 6: Final answer
    x = 21,784.31

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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.