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Finding the Fourth Proportional to 28,558.56, 42,840.71 and 9,836.13

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Solution

The fourth proportional to 28,558.56, 42,840.71 and 9,836.13 is: 14,755.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,558.56 : 42,840.71 = 9,836.13 : x
  2. Step 2: Convert to fraction form
    28,558.56/42,840.71 = 9,836.13/x
  3. Step 3: Cross multiply
    28,558.56x = 42,840.71 × 9,836.13
  4. Step 4: Simplify right side
    28,558.56x = 421,386,817.44
  5. Step 5: Solve for x
    x = 421,386,817.44/28,558.56
  6. Step 6: Final answer
    x = 14,755.18

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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.