Home / 13,410.04-18,518.46-8,638.36

Finding the Fourth Proportional to 13,410.04, 18,518.46 and 8,638.36

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Solution

The fourth proportional to 13,410.04, 18,518.46 and 8,638.36 is: 11,929.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.04 : 18,518.46 = 8,638.36 : x
  2. Step 2: Convert to fraction form
    13,410.04/18,518.46 = 8,638.36/x
  3. Step 3: Cross multiply
    13,410.04x = 18,518.46 × 8,638.36
  4. Step 4: Simplify right side
    13,410.04x = 159,969,124.13
  5. Step 5: Solve for x
    x = 159,969,124.13/13,410.04
  6. Step 6: Final answer
    x = 11,929.06

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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.