Home / 28,626.78-39,486.78-20,680.68

Finding the Fourth Proportional to 28,626.78, 39,486.78 and 20,680.68

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Solution

The fourth proportional to 28,626.78, 39,486.78 and 20,680.68 is: 28,526.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,626.78 : 39,486.78 = 20,680.68 : x
  2. Step 2: Convert to fraction form
    28,626.78/39,486.78 = 20,680.68/x
  3. Step 3: Cross multiply
    28,626.78x = 39,486.78 × 20,680.68
  4. Step 4: Simplify right side
    28,626.78x = 816,613,461.41
  5. Step 5: Solve for x
    x = 816,613,461.41/28,626.78
  6. Step 6: Final answer
    x = 28,526.21

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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.