Home / 20,485.69-28,270.83-11,532.49

Finding the Fourth Proportional to 20,485.69, 28,270.83 and 11,532.49

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Solution

The fourth proportional to 20,485.69, 28,270.83 and 11,532.49 is: 15,915.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.69 : 28,270.83 = 11,532.49 : x
  2. Step 2: Convert to fraction form
    20,485.69/28,270.83 = 11,532.49/x
  3. Step 3: Cross multiply
    20,485.69x = 28,270.83 × 11,532.49
  4. Step 4: Simplify right side
    20,485.69x = 326,033,064.27
  5. Step 5: Solve for x
    x = 326,033,064.27/20,485.69
  6. Step 6: Final answer
    x = 15,915.16

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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.