Home / 12,828.80-17,687.28-10,520.68

Finding the Fourth Proportional to 12,828.80, 17,687.28 and 10,520.68

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Solution

The fourth proportional to 12,828.80, 17,687.28 and 10,520.68 is: 14,505.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.80 : 17,687.28 = 10,520.68 : x
  2. Step 2: Convert to fraction form
    12,828.80/17,687.28 = 10,520.68/x
  3. Step 3: Cross multiply
    12,828.80x = 17,687.28 × 10,520.68
  4. Step 4: Simplify right side
    12,828.80x = 186,082,212.95
  5. Step 5: Solve for x
    x = 186,082,212.95/12,828.80
  6. Step 6: Final answer
    x = 14,505.04

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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.