Home / 28,650.43-39,538.73-15,730.20

Finding the Fourth Proportional to 28,650.43, 39,538.73 and 15,730.20

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Solution

The fourth proportional to 28,650.43, 39,538.73 and 15,730.20 is: 21,708.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,650.43 : 39,538.73 = 15,730.20 : x
  2. Step 2: Convert to fraction form
    28,650.43/39,538.73 = 15,730.20/x
  3. Step 3: Cross multiply
    28,650.43x = 39,538.73 × 15,730.20
  4. Step 4: Simplify right side
    28,650.43x = 621,952,169.97
  5. Step 5: Solve for x
    x = 621,952,169.97/28,650.43
  6. Step 6: Final answer
    x = 21,708.30

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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.