Home / 20,629.54-28,455.87-12,561.13

Finding the Fourth Proportional to 20,629.54, 28,455.87 and 12,561.13

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Solution

The fourth proportional to 20,629.54, 28,455.87 and 12,561.13 is: 17,326.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.54 : 28,455.87 = 12,561.13 : x
  2. Step 2: Convert to fraction form
    20,629.54/28,455.87 = 12,561.13/x
  3. Step 3: Cross multiply
    20,629.54x = 28,455.87 × 12,561.13
  4. Step 4: Simplify right side
    20,629.54x = 357,437,882.33
  5. Step 5: Solve for x
    x = 357,437,882.33/20,629.54
  6. Step 6: Final answer
    x = 17,326.51

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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.