Home / 13,348.21-18,421.64-7,381.81

Finding the Fourth Proportional to 13,348.21, 18,421.64 and 7,381.81

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Solution

The fourth proportional to 13,348.21, 18,421.64 and 7,381.81 is: 10,187.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,348.21 : 18,421.64 = 7,381.81 : x
  2. Step 2: Convert to fraction form
    13,348.21/18,421.64 = 7,381.81/x
  3. Step 3: Cross multiply
    13,348.21x = 18,421.64 × 7,381.81
  4. Step 4: Simplify right side
    13,348.21x = 135,985,046.37
  5. Step 5: Solve for x
    x = 135,985,046.37/13,348.21
  6. Step 6: Final answer
    x = 10,187.51

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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.