Home / 12,931.90-19,372.20-10,145.50

Finding the Fourth Proportional to 12,931.90, 19,372.20 and 10,145.50

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Solution

The fourth proportional to 12,931.90, 19,372.20 and 10,145.50 is: 15,198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.90 : 19,372.20 = 10,145.50 : x
  2. Step 2: Convert to fraction form
    12,931.90/19,372.20 = 10,145.50/x
  3. Step 3: Cross multiply
    12,931.90x = 19,372.20 × 10,145.50
  4. Step 4: Simplify right side
    12,931.90x = 196,540,655.10
  5. Step 5: Solve for x
    x = 196,540,655.10/12,931.90
  6. Step 6: Final answer
    x = 15,198.13

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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.