Home / 20,320.85-27,980.47-17,788.79

Finding the Fourth Proportional to 20,320.85, 27,980.47 and 17,788.79

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Solution

The fourth proportional to 20,320.85, 27,980.47 and 17,788.79 is: 24,493.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.85 : 27,980.47 = 17,788.79 : x
  2. Step 2: Convert to fraction form
    20,320.85/27,980.47 = 17,788.79/x
  3. Step 3: Cross multiply
    20,320.85x = 27,980.47 × 17,788.79
  4. Step 4: Simplify right side
    20,320.85x = 497,738,797.12
  5. Step 5: Solve for x
    x = 497,738,797.12/20,320.85
  6. Step 6: Final answer
    x = 24,493.99

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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.