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Finding the Fourth Proportional to 8,638.99, 12,962.13 and 4,256.49

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Solution

The fourth proportional to 8,638.99, 12,962.13 and 4,256.49 is: 6,386.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.99 : 12,962.13 = 4,256.49 : x
  2. Step 2: Convert to fraction form
    8,638.99/12,962.13 = 4,256.49/x
  3. Step 3: Cross multiply
    8,638.99x = 12,962.13 × 4,256.49
  4. Step 4: Simplify right side
    8,638.99x = 55,173,176.72
  5. Step 5: Solve for x
    x = 55,173,176.72/8,638.99
  6. Step 6: Final answer
    x = 6,386.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.