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Finding the Fourth Proportional to 28,505.21, 42,753.95 and 7,446.72

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Solution

The fourth proportional to 28,505.21, 42,753.95 and 7,446.72 is: 11,169.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.21 : 42,753.95 = 7,446.72 : x
  2. Step 2: Convert to fraction form
    28,505.21/42,753.95 = 7,446.72/x
  3. Step 3: Cross multiply
    28,505.21x = 42,753.95 × 7,446.72
  4. Step 4: Simplify right side
    28,505.21x = 318,376,657.31
  5. Step 5: Solve for x
    x = 318,376,657.31/28,505.21
  6. Step 6: Final answer
    x = 11,169.07

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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.