Home / 13,575.21-20,345.81-7,338.21

Finding the Fourth Proportional to 13,575.21, 20,345.81 and 7,338.21

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Solution

The fourth proportional to 13,575.21, 20,345.81 and 7,338.21 is: 10,998.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,575.21 : 20,345.81 = 7,338.21 : x
  2. Step 2: Convert to fraction form
    13,575.21/20,345.81 = 7,338.21/x
  3. Step 3: Cross multiply
    13,575.21x = 20,345.81 × 7,338.21
  4. Step 4: Simplify right side
    13,575.21x = 149,301,789.71
  5. Step 5: Solve for x
    x = 149,301,789.71/13,575.21
  6. Step 6: Final answer
    x = 10,998.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.