Home / 13,131.76-19,700.04-7,931.44

Finding the Fourth Proportional to 13,131.76, 19,700.04 and 7,931.44

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Solution

The fourth proportional to 13,131.76, 19,700.04 and 7,931.44 is: 11,898.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.76 : 19,700.04 = 7,931.44 : x
  2. Step 2: Convert to fraction form
    13,131.76/19,700.04 = 7,931.44/x
  3. Step 3: Cross multiply
    13,131.76x = 19,700.04 × 7,931.44
  4. Step 4: Simplify right side
    13,131.76x = 156,249,685.26
  5. Step 5: Solve for x
    x = 156,249,685.26/13,131.76
  6. Step 6: Final answer
    x = 11,898.61

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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.