Home / 13,709.27-18,918.86-7,421.65

Finding the Fourth Proportional to 13,709.27, 18,918.86 and 7,421.65

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Solution

The fourth proportional to 13,709.27, 18,918.86 and 7,421.65 is: 10,241.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.27 : 18,918.86 = 7,421.65 : x
  2. Step 2: Convert to fraction form
    13,709.27/18,918.86 = 7,421.65/x
  3. Step 3: Cross multiply
    13,709.27x = 18,918.86 × 7,421.65
  4. Step 4: Simplify right side
    13,709.27x = 140,409,072.91
  5. Step 5: Solve for x
    x = 140,409,072.91/13,709.27
  6. Step 6: Final answer
    x = 10,241.91

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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.