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Finding the Fourth Proportional to 13,667.39, 20,426.19 and 9,977.39

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Solution

The fourth proportional to 13,667.39, 20,426.19 and 9,977.39 is: 14,911.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,667.39 : 20,426.19 = 9,977.39 : x
  2. Step 2: Convert to fraction form
    13,667.39/20,426.19 = 9,977.39/x
  3. Step 3: Cross multiply
    13,667.39x = 20,426.19 × 9,977.39
  4. Step 4: Simplify right side
    13,667.39x = 203,799,986.66
  5. Step 5: Solve for x
    x = 203,799,986.66/13,667.39
  6. Step 6: Final answer
    x = 14,911.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.