Home / 54,709.86-82,090.30-21,421.28

Finding the Fourth Proportional to 54,709.86, 82,090.30 and 21,421.28

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Solution

The fourth proportional to 54,709.86, 82,090.30 and 21,421.28 is: 32,141.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,709.86 : 82,090.30 = 21,421.28 : x
  2. Step 2: Convert to fraction form
    54,709.86/82,090.30 = 21,421.28/x
  3. Step 3: Cross multiply
    54,709.86x = 82,090.30 × 21,421.28
  4. Step 4: Simplify right side
    54,709.86x = 1,758,479,301.58
  5. Step 5: Solve for x
    x = 1,758,479,301.58/54,709.86
  6. Step 6: Final answer
    x = 32,141.91

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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.