Home / 20,992.47-28,968.29-11,561.03

Finding the Fourth Proportional to 20,992.47, 28,968.29 and 11,561.03

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Solution

The fourth proportional to 20,992.47, 28,968.29 and 11,561.03 is: 15,953.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.47 : 28,968.29 = 11,561.03 : x
  2. Step 2: Convert to fraction form
    20,992.47/28,968.29 = 11,561.03/x
  3. Step 3: Cross multiply
    20,992.47x = 28,968.29 × 11,561.03
  4. Step 4: Simplify right side
    20,992.47x = 334,903,219.08
  5. Step 5: Solve for x
    x = 334,903,219.08/20,992.47
  6. Step 6: Final answer
    x = 15,953.50

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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.