Home / 20,866.63-28,795.74-11,435.53

Finding the Fourth Proportional to 20,866.63, 28,795.74 and 11,435.53

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Solution

The fourth proportional to 20,866.63, 28,795.74 and 11,435.53 is: 15,780.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.63 : 28,795.74 = 11,435.53 : x
  2. Step 2: Convert to fraction form
    20,866.63/28,795.74 = 11,435.53/x
  3. Step 3: Cross multiply
    20,866.63x = 28,795.74 × 11,435.53
  4. Step 4: Simplify right side
    20,866.63x = 329,294,548.64
  5. Step 5: Solve for x
    x = 329,294,548.64/20,866.63
  6. Step 6: Final answer
    x = 15,780.92

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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.