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Finding the Fourth Proportional to 28,436.94, 42,645.86 and 9,457.20

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Solution

The fourth proportional to 28,436.94, 42,645.86 and 9,457.20 is: 14,182.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.94 : 42,645.86 = 9,457.20 : x
  2. Step 2: Convert to fraction form
    28,436.94/42,645.86 = 9,457.20/x
  3. Step 3: Cross multiply
    28,436.94x = 42,645.86 × 9,457.20
  4. Step 4: Simplify right side
    28,436.94x = 403,310,427.19
  5. Step 5: Solve for x
    x = 403,310,427.19/28,436.94
  6. Step 6: Final answer
    x = 14,182.62

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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.