Home / 12,911.40-19,373.50-5,120.04

Finding the Fourth Proportional to 12,911.40, 19,373.50 and 5,120.04

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Solution

The fourth proportional to 12,911.40, 19,373.50 and 5,120.04 is: 7,682.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.40 : 19,373.50 = 5,120.04 : x
  2. Step 2: Convert to fraction form
    12,911.40/19,373.50 = 5,120.04/x
  3. Step 3: Cross multiply
    12,911.40x = 19,373.50 × 5,120.04
  4. Step 4: Simplify right side
    12,911.40x = 99,193,094.94
  5. Step 5: Solve for x
    x = 99,193,094.94/12,911.40
  6. Step 6: Final answer
    x = 7,682.60

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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.