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Finding the Fourth Proportional to 12,913.13, 17,820.12 and 7,324.13

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Solution

The fourth proportional to 12,913.13, 17,820.12 and 7,324.13 is: 10,107.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.13 : 17,820.12 = 7,324.13 : x
  2. Step 2: Convert to fraction form
    12,913.13/17,820.12 = 7,324.13/x
  3. Step 3: Cross multiply
    12,913.13x = 17,820.12 × 7,324.13
  4. Step 4: Simplify right side
    12,913.13x = 130,516,786.40
  5. Step 5: Solve for x
    x = 130,516,786.40/12,913.13
  6. Step 6: Final answer
    x = 10,107.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.