Home / 28,215.21-38,918.37-18,127.74

Finding the Fourth Proportional to 28,215.21, 38,918.37 and 18,127.74

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Solution

The fourth proportional to 28,215.21, 38,918.37 and 18,127.74 is: 25,004.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.21 : 38,918.37 = 18,127.74 : x
  2. Step 2: Convert to fraction form
    28,215.21/38,918.37 = 18,127.74/x
  3. Step 3: Cross multiply
    28,215.21x = 38,918.37 × 18,127.74
  4. Step 4: Simplify right side
    28,215.21x = 705,502,092.58
  5. Step 5: Solve for x
    x = 705,502,092.58/28,215.21
  6. Step 6: Final answer
    x = 25,004.32

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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.