Home / 20,878.11-31,327.20-10,349.10

Finding the Fourth Proportional to 20,878.11, 31,327.20 and 10,349.10

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Solution

The fourth proportional to 20,878.11, 31,327.20 and 10,349.10 is: 15,528.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.11 : 31,327.20 = 10,349.10 : x
  2. Step 2: Convert to fraction form
    20,878.11/31,327.20 = 10,349.10/x
  3. Step 3: Cross multiply
    20,878.11x = 31,327.20 × 10,349.10
  4. Step 4: Simplify right side
    20,878.11x = 324,208,325.52
  5. Step 5: Solve for x
    x = 324,208,325.52/20,878.11
  6. Step 6: Final answer
    x = 15,528.62

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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.