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Finding the Fourth Proportional to 12,576.63, 18,835.38 and 7,386.15

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Solution

The fourth proportional to 12,576.63, 18,835.38 and 7,386.15 is: 11,061.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,576.63 : 18,835.38 = 7,386.15 : x
  2. Step 2: Convert to fraction form
    12,576.63/18,835.38 = 7,386.15/x
  3. Step 3: Cross multiply
    12,576.63x = 18,835.38 × 7,386.15
  4. Step 4: Simplify right side
    12,576.63x = 139,120,941.99
  5. Step 5: Solve for x
    x = 139,120,941.99/12,576.63
  6. Step 6: Final answer
    x = 11,061.86

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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.