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Finding the Fourth Proportional to 28,028.94, 42,043.28 and 9,310.40

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Solution

The fourth proportional to 28,028.94, 42,043.28 and 9,310.40 is: 13,965.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,028.94 : 42,043.28 = 9,310.40 : x
  2. Step 2: Convert to fraction form
    28,028.94/42,043.28 = 9,310.40/x
  3. Step 3: Cross multiply
    28,028.94x = 42,043.28 × 9,310.40
  4. Step 4: Simplify right side
    28,028.94x = 391,439,754.11
  5. Step 5: Solve for x
    x = 391,439,754.11/28,028.94
  6. Step 6: Final answer
    x = 13,965.56

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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.