Home / 18,721.80-25,758.54-14,219.28

Finding the Fourth Proportional to 18,721.80, 25,758.54 and 14,219.28

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Solution

The fourth proportional to 18,721.80, 25,758.54 and 14,219.28 is: 19,563.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.80 : 25,758.54 = 14,219.28 : x
  2. Step 2: Convert to fraction form
    18,721.80/25,758.54 = 14,219.28/x
  3. Step 3: Cross multiply
    18,721.80x = 25,758.54 × 14,219.28
  4. Step 4: Simplify right side
    18,721.80x = 366,267,892.65
  5. Step 5: Solve for x
    x = 366,267,892.65/18,721.80
  6. Step 6: Final answer
    x = 19,563.71

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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.