Home / 28,428.96-42,648.48-13,664.64

Finding the Fourth Proportional to 28,428.96, 42,648.48 and 13,664.64

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Solution

The fourth proportional to 28,428.96, 42,648.48 and 13,664.64 is: 20,499.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.96 : 42,648.48 = 13,664.64 : x
  2. Step 2: Convert to fraction form
    28,428.96/42,648.48 = 13,664.64/x
  3. Step 3: Cross multiply
    28,428.96x = 42,648.48 × 13,664.64
  4. Step 4: Simplify right side
    28,428.96x = 582,776,125.75
  5. Step 5: Solve for x
    x = 582,776,125.75/28,428.96
  6. Step 6: Final answer
    x = 20,499.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.