Home / 20,640.32-28,486.06-12,256.82

Finding the Fourth Proportional to 20,640.32, 28,486.06 and 12,256.82

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Solution

The fourth proportional to 20,640.32, 28,486.06 and 12,256.82 is: 16,915.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.32 : 28,486.06 = 12,256.82 : x
  2. Step 2: Convert to fraction form
    20,640.32/28,486.06 = 12,256.82/x
  3. Step 3: Cross multiply
    20,640.32x = 28,486.06 × 12,256.82
  4. Step 4: Simplify right side
    20,640.32x = 349,148,367.50
  5. Step 5: Solve for x
    x = 349,148,367.50/20,640.32
  6. Step 6: Final answer
    x = 16,915.84

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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.