Home / 20,629.76-28,468.80-12,560.72

Finding the Fourth Proportional to 20,629.76, 28,468.80 and 12,560.72

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Solution

The fourth proportional to 20,629.76, 28,468.80 and 12,560.72 is: 17,333.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.76 : 28,468.80 = 12,560.72 : x
  2. Step 2: Convert to fraction form
    20,629.76/28,468.80 = 12,560.72/x
  3. Step 3: Cross multiply
    20,629.76x = 28,468.80 × 12,560.72
  4. Step 4: Simplify right side
    20,629.76x = 357,588,625.54
  5. Step 5: Solve for x
    x = 357,588,625.54/20,629.76
  6. Step 6: Final answer
    x = 17,333.63

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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.