Home / 13,860.35-20,770.38-7,918.91

Finding the Fourth Proportional to 13,860.35, 20,770.38 and 7,918.91

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Solution

The fourth proportional to 13,860.35, 20,770.38 and 7,918.91 is: 11,866.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.35 : 20,770.38 = 7,918.91 : x
  2. Step 2: Convert to fraction form
    13,860.35/20,770.38 = 7,918.91/x
  3. Step 3: Cross multiply
    13,860.35x = 20,770.38 × 7,918.91
  4. Step 4: Simplify right side
    13,860.35x = 164,478,769.89
  5. Step 5: Solve for x
    x = 164,478,769.89/13,860.35
  6. Step 6: Final answer
    x = 11,866.86

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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.