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Finding the Fourth Proportional to 28,108.59, 42,163.47 and 11,457.11

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Solution

The fourth proportional to 28,108.59, 42,163.47 and 11,457.11 is: 17,185.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.59 : 42,163.47 = 11,457.11 : x
  2. Step 2: Convert to fraction form
    28,108.59/42,163.47 = 11,457.11/x
  3. Step 3: Cross multiply
    28,108.59x = 42,163.47 × 11,457.11
  4. Step 4: Simplify right side
    28,108.59x = 483,071,302.95
  5. Step 5: Solve for x
    x = 483,071,302.95/28,108.59
  6. Step 6: Final answer
    x = 17,185.90

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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.