Home / 20,971.13-28,940.36-11,539.89

Finding the Fourth Proportional to 20,971.13, 28,940.36 and 11,539.89

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Solution

The fourth proportional to 20,971.13, 28,940.36 and 11,539.89 is: 15,925.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.13 : 28,940.36 = 11,539.89 : x
  2. Step 2: Convert to fraction form
    20,971.13/28,940.36 = 11,539.89/x
  3. Step 3: Cross multiply
    20,971.13x = 28,940.36 × 11,539.89
  4. Step 4: Simplify right side
    20,971.13x = 333,968,513.26
  5. Step 5: Solve for x
    x = 333,968,513.26/20,971.13
  6. Step 6: Final answer
    x = 15,925.16

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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.