Home / 28,220.19-38,945.60-15,644.94

Finding the Fourth Proportional to 28,220.19, 38,945.60 and 15,644.94

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Solution

The fourth proportional to 28,220.19, 38,945.60 and 15,644.94 is: 21,590.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.19 : 38,945.60 = 15,644.94 : x
  2. Step 2: Convert to fraction form
    28,220.19/38,945.60 = 15,644.94/x
  3. Step 3: Cross multiply
    28,220.19x = 38,945.60 × 15,644.94
  4. Step 4: Simplify right side
    28,220.19x = 609,301,380.54
  5. Step 5: Solve for x
    x = 609,301,380.54/28,220.19
  6. Step 6: Final answer
    x = 21,590.98

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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.