Home / 18,720.81-28,066.28-10,814.31

Finding the Fourth Proportional to 18,720.81, 28,066.28 and 10,814.31

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Solution

The fourth proportional to 18,720.81, 28,066.28 and 10,814.31 is: 16,212.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.81 : 28,066.28 = 10,814.31 : x
  2. Step 2: Convert to fraction form
    18,720.81/28,066.28 = 10,814.31/x
  3. Step 3: Cross multiply
    18,720.81x = 28,066.28 × 10,814.31
  4. Step 4: Simplify right side
    18,720.81x = 303,517,398.40
  5. Step 5: Solve for x
    x = 303,517,398.40/18,720.81
  6. Step 6: Final answer
    x = 16,212.83

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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.