Home / 20,686.72-28,533.04-12,733.28

Finding the Fourth Proportional to 20,686.72, 28,533.04 and 12,733.28

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Solution

The fourth proportional to 20,686.72, 28,533.04 and 12,733.28 is: 17,562.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.72 : 28,533.04 = 12,733.28 : x
  2. Step 2: Convert to fraction form
    20,686.72/28,533.04 = 12,733.28/x
  3. Step 3: Cross multiply
    20,686.72x = 28,533.04 × 12,733.28
  4. Step 4: Simplify right side
    20,686.72x = 363,319,187.57
  5. Step 5: Solve for x
    x = 363,319,187.57/20,686.72
  6. Step 6: Final answer
    x = 17,562.92

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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.