Home / 20,709.02-28,578.78-11,277.58

Finding the Fourth Proportional to 20,709.02, 28,578.78 and 11,277.58

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Solution

The fourth proportional to 20,709.02, 28,578.78 and 11,277.58 is: 15,563.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.02 : 28,578.78 = 11,277.58 : x
  2. Step 2: Convert to fraction form
    20,709.02/28,578.78 = 11,277.58/x
  3. Step 3: Cross multiply
    20,709.02x = 28,578.78 × 11,277.58
  4. Step 4: Simplify right side
    20,709.02x = 322,299,477.75
  5. Step 5: Solve for x
    x = 322,299,477.75/20,709.02
  6. Step 6: Final answer
    x = 15,563.24

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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.