Home / 13,609.29-18,778.44-7,641.21

Finding the Fourth Proportional to 13,609.29, 18,778.44 and 7,641.21

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Solution

The fourth proportional to 13,609.29, 18,778.44 and 7,641.21 is: 10,543.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.29 : 18,778.44 = 7,641.21 : x
  2. Step 2: Convert to fraction form
    13,609.29/18,778.44 = 7,641.21/x
  3. Step 3: Cross multiply
    13,609.29x = 18,778.44 × 7,641.21
  4. Step 4: Simplify right side
    13,609.29x = 143,490,003.51
  5. Step 5: Solve for x
    x = 143,490,003.51/13,609.29
  6. Step 6: Final answer
    x = 10,543.53

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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.