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Finding the Fourth Proportional to 31,870.64, 47,805.96 and 8,497.16

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Solution

The fourth proportional to 31,870.64, 47,805.96 and 8,497.16 is: 12,745.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,870.64 : 47,805.96 = 8,497.16 : x
  2. Step 2: Convert to fraction form
    31,870.64/47,805.96 = 8,497.16/x
  3. Step 3: Cross multiply
    31,870.64x = 47,805.96 × 8,497.16
  4. Step 4: Simplify right side
    31,870.64x = 406,214,891.07
  5. Step 5: Solve for x
    x = 406,214,891.07/31,870.64
  6. Step 6: Final answer
    x = 12,745.74

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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.