Home / 20,205.65-27,888.33-13,119.77

Finding the Fourth Proportional to 20,205.65, 27,888.33 and 13,119.77

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Solution

The fourth proportional to 20,205.65, 27,888.33 and 13,119.77 is: 18,108.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.65 : 27,888.33 = 13,119.77 : x
  2. Step 2: Convert to fraction form
    20,205.65/27,888.33 = 13,119.77/x
  3. Step 3: Cross multiply
    20,205.65x = 27,888.33 × 13,119.77
  4. Step 4: Simplify right side
    20,205.65x = 365,888,594.20
  5. Step 5: Solve for x
    x = 365,888,594.20/20,205.65
  6. Step 6: Final answer
    x = 18,108.23

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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.