Home / 20,660.37-28,511.51-12,275.25

Finding the Fourth Proportional to 20,660.37, 28,511.51 and 12,275.25

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Solution

The fourth proportional to 20,660.37, 28,511.51 and 12,275.25 is: 16,939.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.37 : 28,511.51 = 12,275.25 : x
  2. Step 2: Convert to fraction form
    20,660.37/28,511.51 = 12,275.25/x
  3. Step 3: Cross multiply
    20,660.37x = 28,511.51 × 12,275.25
  4. Step 4: Simplify right side
    20,660.37x = 349,985,851.75
  5. Step 5: Solve for x
    x = 349,985,851.75/20,660.37
  6. Step 6: Final answer
    x = 16,939.96

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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.