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Finding the Fourth Proportional to 28,615.70, 42,927.60 and 8,892.20

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Solution

The fourth proportional to 28,615.70, 42,927.60 and 8,892.20 is: 13,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.70 : 42,927.60 = 8,892.20 : x
  2. Step 2: Convert to fraction form
    28,615.70/42,927.60 = 8,892.20/x
  3. Step 3: Cross multiply
    28,615.70x = 42,927.60 × 8,892.20
  4. Step 4: Simplify right side
    28,615.70x = 381,720,804.72
  5. Step 5: Solve for x
    x = 381,720,804.72/28,615.70
  6. Step 6: Final answer
    x = 13,339.56

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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.