Home / 13,396.59-18,488.05-7,428.51

Finding the Fourth Proportional to 13,396.59, 18,488.05 and 7,428.51

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Solution

The fourth proportional to 13,396.59, 18,488.05 and 7,428.51 is: 10,251.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.59 : 18,488.05 = 7,428.51 : x
  2. Step 2: Convert to fraction form
    13,396.59/18,488.05 = 7,428.51/x
  3. Step 3: Cross multiply
    13,396.59x = 18,488.05 × 7,428.51
  4. Step 4: Simplify right side
    13,396.59x = 137,338,645.73
  5. Step 5: Solve for x
    x = 137,338,645.73/13,396.59
  6. Step 6: Final answer
    x = 10,251.76

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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.