Home / 12,010.20-18,015.36-5,428.68

Finding the Fourth Proportional to 12,010.20, 18,015.36 and 5,428.68

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Solution

The fourth proportional to 12,010.20, 18,015.36 and 5,428.68 is: 8,143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,010.20 : 18,015.36 = 5,428.68 : x
  2. Step 2: Convert to fraction form
    12,010.20/18,015.36 = 5,428.68/x
  3. Step 3: Cross multiply
    12,010.20x = 18,015.36 × 5,428.68
  4. Step 4: Simplify right side
    12,010.20x = 97,799,624.52
  5. Step 5: Solve for x
    x = 97,799,624.52/12,010.20
  6. Step 6: Final answer
    x = 8,143.05

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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.