Home / 28,185.89-42,242.11-15,705.41

Finding the Fourth Proportional to 28,185.89, 42,242.11 and 15,705.41

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Solution

The fourth proportional to 28,185.89, 42,242.11 and 15,705.41 is: 23,537.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.89 : 42,242.11 = 15,705.41 : x
  2. Step 2: Convert to fraction form
    28,185.89/42,242.11 = 15,705.41/x
  3. Step 3: Cross multiply
    28,185.89x = 42,242.11 × 15,705.41
  4. Step 4: Simplify right side
    28,185.89x = 663,429,406.34
  5. Step 5: Solve for x
    x = 663,429,406.34/28,185.89
  6. Step 6: Final answer
    x = 23,537.65

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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.