Home / 20,854.98-28,782.63-11,900.43

Finding the Fourth Proportional to 20,854.98, 28,782.63 and 11,900.43

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Solution

The fourth proportional to 20,854.98, 28,782.63 and 11,900.43 is: 16,424.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.98 : 28,782.63 = 11,900.43 : x
  2. Step 2: Convert to fraction form
    20,854.98/28,782.63 = 11,900.43/x
  3. Step 3: Cross multiply
    20,854.98x = 28,782.63 × 11,900.43
  4. Step 4: Simplify right side
    20,854.98x = 342,525,673.53
  5. Step 5: Solve for x
    x = 342,525,673.53/20,854.98
  6. Step 6: Final answer
    x = 16,424.17

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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.