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Finding the Fourth Proportional to 28,415.43, 42,621.60 and 8,693.98

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Solution

The fourth proportional to 28,415.43, 42,621.60 and 8,693.98 is: 13,040.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.43 : 42,621.60 = 8,693.98 : x
  2. Step 2: Convert to fraction form
    28,415.43/42,621.60 = 8,693.98/x
  3. Step 3: Cross multiply
    28,415.43x = 42,621.60 × 8,693.98
  4. Step 4: Simplify right side
    28,415.43x = 370,551,337.97
  5. Step 5: Solve for x
    x = 370,551,337.97/28,415.43
  6. Step 6: Final answer
    x = 13,040.50

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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.