Home / 28,203.94-38,921.44-15,628.69

Finding the Fourth Proportional to 28,203.94, 38,921.44 and 15,628.69

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Solution

The fourth proportional to 28,203.94, 38,921.44 and 15,628.69 is: 21,567.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.94 : 38,921.44 = 15,628.69 : x
  2. Step 2: Convert to fraction form
    28,203.94/38,921.44 = 15,628.69/x
  3. Step 3: Cross multiply
    28,203.94x = 38,921.44 × 15,628.69
  4. Step 4: Simplify right side
    28,203.94x = 608,290,983.74
  5. Step 5: Solve for x
    x = 608,290,983.74/28,203.94
  6. Step 6: Final answer
    x = 21,567.59

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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.