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Finding the Fourth Proportional to 13,636.48, 18,801.12 and 8,913.28

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Solution

The fourth proportional to 13,636.48, 18,801.12 and 8,913.28 is: 12,289.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,636.48 : 18,801.12 = 8,913.28 : x
  2. Step 2: Convert to fraction form
    13,636.48/18,801.12 = 8,913.28/x
  3. Step 3: Cross multiply
    13,636.48x = 18,801.12 × 8,913.28
  4. Step 4: Simplify right side
    13,636.48x = 167,579,646.87
  5. Step 5: Solve for x
    x = 167,579,646.87/13,636.48
  6. Step 6: Final answer
    x = 12,289.07

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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.