Home / 20,687.67-28,548.99-11,256.23

Finding the Fourth Proportional to 20,687.67, 28,548.99 and 11,256.23

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Solution

The fourth proportional to 20,687.67, 28,548.99 and 11,256.23 is: 15,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.67 : 28,548.99 = 11,256.23 : x
  2. Step 2: Convert to fraction form
    20,687.67/28,548.99 = 11,256.23/x
  3. Step 3: Cross multiply
    20,687.67x = 28,548.99 × 11,256.23
  4. Step 4: Simplify right side
    20,687.67x = 321,354,069.08
  5. Step 5: Solve for x
    x = 321,354,069.08/20,687.67
  6. Step 6: Final answer
    x = 15,533.60

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1.5x scale

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.