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Finding the Fourth Proportional to 13,918.62, 20,877.69 and 4,684.62

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Solution

The fourth proportional to 13,918.62, 20,877.69 and 4,684.62 is: 7,026.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.62 : 20,877.69 = 4,684.62 : x
  2. Step 2: Convert to fraction form
    13,918.62/20,877.69 = 4,684.62/x
  3. Step 3: Cross multiply
    13,918.62x = 20,877.69 × 4,684.62
  4. Step 4: Simplify right side
    13,918.62x = 97,804,044.13
  5. Step 5: Solve for x
    x = 97,804,044.13/13,918.62
  6. Step 6: Final answer
    x = 7,026.85

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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.