Home / 18,987.48-28,471.43-11,105.37

Finding the Fourth Proportional to 18,987.48, 28,471.43 and 11,105.37

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Solution

The fourth proportional to 18,987.48, 28,471.43 and 11,105.37 is: 16,652.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.48 : 28,471.43 = 11,105.37 : x
  2. Step 2: Convert to fraction form
    18,987.48/28,471.43 = 11,105.37/x
  3. Step 3: Cross multiply
    18,987.48x = 28,471.43 × 11,105.37
  4. Step 4: Simplify right side
    18,987.48x = 316,185,792.34
  5. Step 5: Solve for x
    x = 316,185,792.34/18,987.48
  6. Step 6: Final answer
    x = 16,652.33

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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.