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Finding the Fourth Proportional to 18,693.60, 28,040.19 and 10,807.98

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Solution

The fourth proportional to 18,693.60, 28,040.19 and 10,807.98 is: 16,211.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.60 : 28,040.19 = 10,807.98 : x
  2. Step 2: Convert to fraction form
    18,693.60/28,040.19 = 10,807.98/x
  3. Step 3: Cross multiply
    18,693.60x = 28,040.19 × 10,807.98
  4. Step 4: Simplify right side
    18,693.60x = 303,057,812.72
  5. Step 5: Solve for x
    x = 303,057,812.72/18,693.60
  6. Step 6: Final answer
    x = 16,211.85

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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.