Home / 28,174.41-38,802.28-21,777.43

Finding the Fourth Proportional to 28,174.41, 38,802.28 and 21,777.43

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Solution

The fourth proportional to 28,174.41, 38,802.28 and 21,777.43 is: 29,992.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,174.41 : 38,802.28 = 21,777.43 : x
  2. Step 2: Convert to fraction form
    28,174.41/38,802.28 = 21,777.43/x
  3. Step 3: Cross multiply
    28,174.41x = 38,802.28 × 21,777.43
  4. Step 4: Simplify right side
    28,174.41x = 845,013,977.18
  5. Step 5: Solve for x
    x = 845,013,977.18/28,174.41
  6. Step 6: Final answer
    x = 29,992.25

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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.