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Finding the Fourth Proportional to 13,918.34, 20,901.03 and 13,810.82

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Solution

The fourth proportional to 13,918.34, 20,901.03 and 13,810.82 is: 20,739.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.34 : 20,901.03 = 13,810.82 : x
  2. Step 2: Convert to fraction form
    13,918.34/20,901.03 = 13,810.82/x
  3. Step 3: Cross multiply
    13,918.34x = 20,901.03 × 13,810.82
  4. Step 4: Simplify right side
    13,918.34x = 288,660,363.14
  5. Step 5: Solve for x
    x = 288,660,363.14/13,918.34
  6. Step 6: Final answer
    x = 20,739.57

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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.