Home / 28,179.80-38,887.64-15,604.28

Finding the Fourth Proportional to 28,179.80, 38,887.64 and 15,604.28

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Solution

The fourth proportional to 28,179.80, 38,887.64 and 15,604.28 is: 21,533.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,179.80 : 38,887.64 = 15,604.28 : x
  2. Step 2: Convert to fraction form
    28,179.80/38,887.64 = 15,604.28/x
  3. Step 3: Cross multiply
    28,179.80x = 38,887.64 × 15,604.28
  4. Step 4: Simplify right side
    28,179.80x = 606,813,623.10
  5. Step 5: Solve for x
    x = 606,813,623.10/28,179.80
  6. Step 6: Final answer
    x = 21,533.64

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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.