Home / 20,780.19-28,669.54-11,825.45

Finding the Fourth Proportional to 20,780.19, 28,669.54 and 11,825.45

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Solution

The fourth proportional to 20,780.19, 28,669.54 and 11,825.45 is: 16,315.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.19 : 28,669.54 = 11,825.45 : x
  2. Step 2: Convert to fraction form
    20,780.19/28,669.54 = 11,825.45/x
  3. Step 3: Cross multiply
    20,780.19x = 28,669.54 × 11,825.45
  4. Step 4: Simplify right side
    20,780.19x = 339,030,211.79
  5. Step 5: Solve for x
    x = 339,030,211.79/20,780.19
  6. Step 6: Final answer
    x = 16,315.07

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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.