Home / 13,985.77-20,971.43-4,123.79

Finding the Fourth Proportional to 13,985.77, 20,971.43 and 4,123.79

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Solution

The fourth proportional to 13,985.77, 20,971.43 and 4,123.79 is: 6,183.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.77 : 20,971.43 = 4,123.79 : x
  2. Step 2: Convert to fraction form
    13,985.77/20,971.43 = 4,123.79/x
  3. Step 3: Cross multiply
    13,985.77x = 20,971.43 × 4,123.79
  4. Step 4: Simplify right side
    13,985.77x = 86,481,752.70
  5. Step 5: Solve for x
    x = 86,481,752.70/13,985.77
  6. Step 6: Final answer
    x = 6,183.56

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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.