Home / 20,802.88-28,720.68-13,541.86

Finding the Fourth Proportional to 20,802.88, 28,720.68 and 13,541.86

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Solution

The fourth proportional to 20,802.88, 28,720.68 and 13,541.86 is: 18,696.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.88 : 28,720.68 = 13,541.86 : x
  2. Step 2: Convert to fraction form
    20,802.88/28,720.68 = 13,541.86/x
  3. Step 3: Cross multiply
    20,802.88x = 28,720.68 × 13,541.86
  4. Step 4: Simplify right side
    20,802.88x = 388,931,284.06
  5. Step 5: Solve for x
    x = 388,931,284.06/20,802.88
  6. Step 6: Final answer
    x = 18,696.04

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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.