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Finding the Fourth Proportional to 13,410.04, 18,508.08 and 7,821.04

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Solution

The fourth proportional to 13,410.04, 18,508.08 and 7,821.04 is: 10,794.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.04 : 18,508.08 = 7,821.04 : x
  2. Step 2: Convert to fraction form
    13,410.04/18,508.08 = 7,821.04/x
  3. Step 3: Cross multiply
    13,410.04x = 18,508.08 × 7,821.04
  4. Step 4: Simplify right side
    13,410.04x = 144,752,434.00
  5. Step 5: Solve for x
    x = 144,752,434.00/13,410.04
  6. Step 6: Final answer
    x = 10,794.33

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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.