Home / 19,992.12-30,008.40-11,688

Finding the Fourth Proportional to 19,992.12, 30,008.40 and 11,688

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Solution

The fourth proportional to 19,992.12, 30,008.40 and 11,688 is: 17,543.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.12 : 30,008.40 = 11,688 : x
  2. Step 2: Convert to fraction form
    19,992.12/30,008.40 = 11,688/x
  3. Step 3: Cross multiply
    19,992.12x = 30,008.40 × 11,688
  4. Step 4: Simplify right side
    19,992.12x = 350,738,179.20
  5. Step 5: Solve for x
    x = 350,738,179.20/19,992.12
  6. Step 6: Final answer
    x = 17,543.82

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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.