Home / 19,980.28-29,985.54-11,222.56

Finding the Fourth Proportional to 19,980.28, 29,985.54 and 11,222.56

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Solution

The fourth proportional to 19,980.28, 29,985.54 and 11,222.56 is: 16,842.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.28 : 29,985.54 = 11,222.56 : x
  2. Step 2: Convert to fraction form
    19,980.28/29,985.54 = 11,222.56/x
  3. Step 3: Cross multiply
    19,980.28x = 29,985.54 × 11,222.56
  4. Step 4: Simplify right side
    19,980.28x = 336,514,521.78
  5. Step 5: Solve for x
    x = 336,514,521.78/19,980.28
  6. Step 6: Final answer
    x = 16,842.33

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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.