Home / 28,691.85-39,583.67-21,156.02

Finding the Fourth Proportional to 28,691.85, 39,583.67 and 21,156.02

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Solution

The fourth proportional to 28,691.85, 39,583.67 and 21,156.02 is: 29,187.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.85 : 39,583.67 = 21,156.02 : x
  2. Step 2: Convert to fraction form
    28,691.85/39,583.67 = 21,156.02/x
  3. Step 3: Cross multiply
    28,691.85x = 39,583.67 × 21,156.02
  4. Step 4: Simplify right side
    28,691.85x = 837,432,610.49
  5. Step 5: Solve for x
    x = 837,432,610.49/28,691.85
  6. Step 6: Final answer
    x = 29,187.12

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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.