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Finding the Fourth Proportional to 20,685.16, 31,040.70 and 8,373.16

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Solution

The fourth proportional to 20,685.16, 31,040.70 and 8,373.16 is: 12,564.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.16 : 31,040.70 = 8,373.16 : x
  2. Step 2: Convert to fraction form
    20,685.16/31,040.70 = 8,373.16/x
  3. Step 3: Cross multiply
    20,685.16x = 31,040.70 × 8,373.16
  4. Step 4: Simplify right side
    20,685.16x = 259,908,747.61
  5. Step 5: Solve for x
    x = 259,908,747.61/20,685.16
  6. Step 6: Final answer
    x = 12,564.99

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.