Home / 13,387.43-18,474.80-7,419.21

Finding the Fourth Proportional to 13,387.43, 18,474.80 and 7,419.21

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Solution

The fourth proportional to 13,387.43, 18,474.80 and 7,419.21 is: 10,238.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.43 : 18,474.80 = 7,419.21 : x
  2. Step 2: Convert to fraction form
    13,387.43/18,474.80 = 7,419.21/x
  3. Step 3: Cross multiply
    13,387.43x = 18,474.80 × 7,419.21
  4. Step 4: Simplify right side
    13,387.43x = 137,068,383.81
  5. Step 5: Solve for x
    x = 137,068,383.81/13,387.43
  6. Step 6: Final answer
    x = 10,238.59

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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.