Home / 13,451.28-20,178.81-3,590.88

Finding the Fourth Proportional to 13,451.28, 20,178.81 and 3,590.88

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Solution

The fourth proportional to 13,451.28, 20,178.81 and 3,590.88 is: 5,386.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,451.28 : 20,178.81 = 3,590.88 : x
  2. Step 2: Convert to fraction form
    13,451.28/20,178.81 = 3,590.88/x
  3. Step 3: Cross multiply
    13,451.28x = 20,178.81 × 3,590.88
  4. Step 4: Simplify right side
    13,451.28x = 72,459,685.25
  5. Step 5: Solve for x
    x = 72,459,685.25/13,451.28
  6. Step 6: Final answer
    x = 5,386.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.