Home / 18,870.36-28,282.86-13,315.38

Finding the Fourth Proportional to 18,870.36, 28,282.86 and 13,315.38

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Solution

The fourth proportional to 18,870.36, 28,282.86 and 13,315.38 is: 19,957.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.36 : 28,282.86 = 13,315.38 : x
  2. Step 2: Convert to fraction form
    18,870.36/28,282.86 = 13,315.38/x
  3. Step 3: Cross multiply
    18,870.36x = 28,282.86 × 13,315.38
  4. Step 4: Simplify right side
    18,870.36x = 376,597,028.39
  5. Step 5: Solve for x
    x = 376,597,028.39/18,870.36
  6. Step 6: Final answer
    x = 19,957.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.