Home / 28,658.63-42,990.68-11,129.83

Finding the Fourth Proportional to 28,658.63, 42,990.68 and 11,129.83

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Solution

The fourth proportional to 28,658.63, 42,990.68 and 11,129.83 is: 16,695.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.63 : 42,990.68 = 11,129.83 : x
  2. Step 2: Convert to fraction form
    28,658.63/42,990.68 = 11,129.83/x
  3. Step 3: Cross multiply
    28,658.63x = 42,990.68 × 11,129.83
  4. Step 4: Simplify right side
    28,658.63x = 478,478,880.33
  5. Step 5: Solve for x
    x = 478,478,880.33/28,658.63
  6. Step 6: Final answer
    x = 16,695.80

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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.