Home / 28,203.95-38,921.37-15,628.70

Finding the Fourth Proportional to 28,203.95, 38,921.37 and 15,628.70

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Solution

The fourth proportional to 28,203.95, 38,921.37 and 15,628.70 is: 21,567.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.95 : 38,921.37 = 15,628.70 : x
  2. Step 2: Convert to fraction form
    28,203.95/38,921.37 = 15,628.70/x
  3. Step 3: Cross multiply
    28,203.95x = 38,921.37 × 15,628.70
  4. Step 4: Simplify right side
    28,203.95x = 608,290,415.32
  5. Step 5: Solve for x
    x = 608,290,415.32/28,203.95
  6. Step 6: Final answer
    x = 21,567.56

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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.