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Finding the Fourth Proportional to 28,605.64, 42,907.92 and 8,883.76

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Solution

The fourth proportional to 28,605.64, 42,907.92 and 8,883.76 is: 13,325.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.64 : 42,907.92 = 8,883.76 : x
  2. Step 2: Convert to fraction form
    28,605.64/42,907.92 = 8,883.76/x
  3. Step 3: Cross multiply
    28,605.64x = 42,907.92 × 8,883.76
  4. Step 4: Simplify right side
    28,605.64x = 381,183,663.38
  5. Step 5: Solve for x
    x = 381,183,663.38/28,605.64
  6. Step 6: Final answer
    x = 13,325.47

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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.