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Finding the Fourth Proportional to 13,337.21, 18,406.21 and 7,368.87

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Solution

The fourth proportional to 13,337.21, 18,406.21 and 7,368.87 is: 10,169.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,337.21 : 18,406.21 = 7,368.87 : x
  2. Step 2: Convert to fraction form
    13,337.21/18,406.21 = 7,368.87/x
  3. Step 3: Cross multiply
    13,337.21x = 18,406.21 × 7,368.87
  4. Step 4: Simplify right side
    13,337.21x = 135,633,022.74
  5. Step 5: Solve for x
    x = 135,633,022.74/13,337.21
  6. Step 6: Final answer
    x = 10,169.52

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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.