Home / 20,308.32-28,017.36-12,852

Finding the Fourth Proportional to 20,308.32, 28,017.36 and 12,852

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Solution

The fourth proportional to 20,308.32, 28,017.36 and 12,852 is: 17,730.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,308.32 : 28,017.36 = 12,852 : x
  2. Step 2: Convert to fraction form
    20,308.32/28,017.36 = 12,852/x
  3. Step 3: Cross multiply
    20,308.32x = 28,017.36 × 12,852
  4. Step 4: Simplify right side
    20,308.32x = 360,079,110.72
  5. Step 5: Solve for x
    x = 360,079,110.72/20,308.32
  6. Step 6: Final answer
    x = 17,730.62

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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.