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Finding the Fourth Proportional to 28,656.36, 42,984.14 and 8,935.11

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Solution

The fourth proportional to 28,656.36, 42,984.14 and 8,935.11 is: 13,402.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,656.36 : 42,984.14 = 8,935.11 : x
  2. Step 2: Convert to fraction form
    28,656.36/42,984.14 = 8,935.11/x
  3. Step 3: Cross multiply
    28,656.36x = 42,984.14 × 8,935.11
  4. Step 4: Simplify right side
    28,656.36x = 384,067,974.48
  5. Step 5: Solve for x
    x = 384,067,974.48/28,656.36
  6. Step 6: Final answer
    x = 13,402.54

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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.