Home / 28,136.10-42,204.15-14,139.30

Finding the Fourth Proportional to 28,136.10, 42,204.15 and 14,139.30

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Solution

The fourth proportional to 28,136.10, 42,204.15 and 14,139.30 is: 21,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.10 : 42,204.15 = 14,139.30 : x
  2. Step 2: Convert to fraction form
    28,136.10/42,204.15 = 14,139.30/x
  3. Step 3: Cross multiply
    28,136.10x = 42,204.15 × 14,139.30
  4. Step 4: Simplify right side
    28,136.10x = 596,737,138.10
  5. Step 5: Solve for x
    x = 596,737,138.10/28,136.10
  6. Step 6: Final answer
    x = 21,208.95

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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.