Home / 28,760.64-39,690.54-15,664.47

Finding the Fourth Proportional to 28,760.64, 39,690.54 and 15,664.47

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Solution

The fourth proportional to 28,760.64, 39,690.54 and 15,664.47 is: 21,617.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,760.64 : 39,690.54 = 15,664.47 : x
  2. Step 2: Convert to fraction form
    28,760.64/39,690.54 = 15,664.47/x
  3. Step 3: Cross multiply
    28,760.64x = 39,690.54 × 15,664.47
  4. Step 4: Simplify right side
    28,760.64x = 621,731,273.11
  5. Step 5: Solve for x
    x = 621,731,273.11/28,760.64
  6. Step 6: Final answer
    x = 21,617.44

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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.