Home / 20,709.54-28,579.47-11,278.08

Finding the Fourth Proportional to 20,709.54, 28,579.47 and 11,278.08

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Solution

The fourth proportional to 20,709.54, 28,579.47 and 11,278.08 is: 15,563.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.54 : 28,579.47 = 11,278.08 : x
  2. Step 2: Convert to fraction form
    20,709.54/28,579.47 = 11,278.08/x
  3. Step 3: Cross multiply
    20,709.54x = 28,579.47 × 11,278.08
  4. Step 4: Simplify right side
    20,709.54x = 322,321,549.02
  5. Step 5: Solve for x
    x = 322,321,549.02/20,709.54
  6. Step 6: Final answer
    x = 15,563.92

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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.