Home / 12,171.28-18,168.87-10,695.05

Finding the Fourth Proportional to 12,171.28, 18,168.87 and 10,695.05

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Solution

The fourth proportional to 12,171.28, 18,168.87 and 10,695.05 is: 15,965.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171.28 : 18,168.87 = 10,695.05 : x
  2. Step 2: Convert to fraction form
    12,171.28/18,168.87 = 10,695.05/x
  3. Step 3: Cross multiply
    12,171.28x = 18,168.87 × 10,695.05
  4. Step 4: Simplify right side
    12,171.28x = 194,316,973.09
  5. Step 5: Solve for x
    x = 194,316,973.09/12,171.28
  6. Step 6: Final answer
    x = 15,965.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.