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Finding the Fourth Proportional to 28,137.98, 42,214.91 and 11,509.94

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Solution

The fourth proportional to 28,137.98, 42,214.91 and 11,509.94 is: 17,268.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.98 : 42,214.91 = 11,509.94 : x
  2. Step 2: Convert to fraction form
    28,137.98/42,214.91 = 11,509.94/x
  3. Step 3: Cross multiply
    28,137.98x = 42,214.91 × 11,509.94
  4. Step 4: Simplify right side
    28,137.98x = 485,891,148.07
  5. Step 5: Solve for x
    x = 485,891,148.07/28,137.98
  6. Step 6: Final answer
    x = 17,268.16

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1.5x scale

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.