Home / 18,726.24-28,089.36-12,865.12

Finding the Fourth Proportional to 18,726.24, 28,089.36 and 12,865.12

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Solution

The fourth proportional to 18,726.24, 28,089.36 and 12,865.12 is: 19,297.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.24 : 28,089.36 = 12,865.12 : x
  2. Step 2: Convert to fraction form
    18,726.24/28,089.36 = 12,865.12/x
  3. Step 3: Cross multiply
    18,726.24x = 28,089.36 × 12,865.12
  4. Step 4: Simplify right side
    18,726.24x = 361,372,987.12
  5. Step 5: Solve for x
    x = 361,372,987.12/18,726.24
  6. Step 6: Final answer
    x = 19,297.68

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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.