Home / 13,455.20-18,568.62-7,405.68

Finding the Fourth Proportional to 13,455.20, 18,568.62 and 7,405.68

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Solution

The fourth proportional to 13,455.20, 18,568.62 and 7,405.68 is: 10,220.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.20 : 18,568.62 = 7,405.68 : x
  2. Step 2: Convert to fraction form
    13,455.20/18,568.62 = 7,405.68/x
  3. Step 3: Cross multiply
    13,455.20x = 18,568.62 × 7,405.68
  4. Step 4: Simplify right side
    13,455.20x = 137,513,257.76
  5. Step 5: Solve for x
    x = 137,513,257.76/13,455.20
  6. Step 6: Final answer
    x = 10,220.08

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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.