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Finding the Fourth Proportional to 28,635.61, 42,943.11 and 9,910.56

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Solution

The fourth proportional to 28,635.61, 42,943.11 and 9,910.56 is: 14,862.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,635.61 : 42,943.11 = 9,910.56 : x
  2. Step 2: Convert to fraction form
    28,635.61/42,943.11 = 9,910.56/x
  3. Step 3: Cross multiply
    28,635.61x = 42,943.11 × 9,910.56
  4. Step 4: Simplify right side
    28,635.61x = 425,590,268.24
  5. Step 5: Solve for x
    x = 425,590,268.24/28,635.61
  6. Step 6: Final answer
    x = 14,862.28

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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.