Home / 13,347.21-18,420.26-7,380.81

Finding the Fourth Proportional to 13,347.21, 18,420.26 and 7,380.81

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Solution

The fourth proportional to 13,347.21, 18,420.26 and 7,380.81 is: 10,186.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.21 : 18,420.26 = 7,380.81 : x
  2. Step 2: Convert to fraction form
    13,347.21/18,420.26 = 7,380.81/x
  3. Step 3: Cross multiply
    13,347.21x = 18,420.26 × 7,380.81
  4. Step 4: Simplify right side
    13,347.21x = 135,956,402.31
  5. Step 5: Solve for x
    x = 135,956,402.31/13,347.21
  6. Step 6: Final answer
    x = 10,186.13

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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.