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Finding the Fourth Proportional to 8,466.31, 12,700.30 and 2,918.92

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Solution

The fourth proportional to 8,466.31, 12,700.30 and 2,918.92 is: 4,378.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,466.31 : 12,700.30 = 2,918.92 : x
  2. Step 2: Convert to fraction form
    8,466.31/12,700.30 = 2,918.92/x
  3. Step 3: Cross multiply
    8,466.31x = 12,700.30 × 2,918.92
  4. Step 4: Simplify right side
    8,466.31x = 37,071,159.68
  5. Step 5: Solve for x
    x = 37,071,159.68/8,466.31
  6. Step 6: Final answer
    x = 4,378.67

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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.