Home / 13,530.08-18,665.16-8,812.64

Finding the Fourth Proportional to 13,530.08, 18,665.16 and 8,812.64

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Solution

The fourth proportional to 13,530.08, 18,665.16 and 8,812.64 is: 12,157.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,530.08 : 18,665.16 = 8,812.64 : x
  2. Step 2: Convert to fraction form
    13,530.08/18,665.16 = 8,812.64/x
  3. Step 3: Cross multiply
    13,530.08x = 18,665.16 × 8,812.64
  4. Step 4: Simplify right side
    13,530.08x = 164,489,335.62
  5. Step 5: Solve for x
    x = 164,489,335.62/13,530.08
  6. Step 6: Final answer
    x = 12,157.31

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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.