Home / 20,632.56-28,458.36-12,679.26

Finding the Fourth Proportional to 20,632.56, 28,458.36 and 12,679.26

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Solution

The fourth proportional to 20,632.56, 28,458.36 and 12,679.26 is: 17,488.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,632.56 : 28,458.36 = 12,679.26 : x
  2. Step 2: Convert to fraction form
    20,632.56/28,458.36 = 12,679.26/x
  3. Step 3: Cross multiply
    20,632.56x = 28,458.36 × 12,679.26
  4. Step 4: Simplify right side
    20,632.56x = 360,830,945.61
  5. Step 5: Solve for x
    x = 360,830,945.61/20,632.56
  6. Step 6: Final answer
    x = 17,488.42

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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.