Home / 28,201.98-38,917.89-15,455.01

Finding the Fourth Proportional to 28,201.98, 38,917.89 and 15,455.01

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Solution

The fourth proportional to 28,201.98, 38,917.89 and 15,455.01 is: 21,327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,201.98 : 38,917.89 = 15,455.01 : x
  2. Step 2: Convert to fraction form
    28,201.98/38,917.89 = 15,455.01/x
  3. Step 3: Cross multiply
    28,201.98x = 38,917.89 × 15,455.01
  4. Step 4: Simplify right side
    28,201.98x = 601,476,379.13
  5. Step 5: Solve for x
    x = 601,476,379.13/28,201.98
  6. Step 6: Final answer
    x = 21,327.45

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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.