Home / 20,350.90-30,535.13-10,989.05

Finding the Fourth Proportional to 20,350.90, 30,535.13 and 10,989.05

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Solution

The fourth proportional to 20,350.90, 30,535.13 and 10,989.05 is: 16,488.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.90 : 30,535.13 = 10,989.05 : x
  2. Step 2: Convert to fraction form
    20,350.90/30,535.13 = 10,989.05/x
  3. Step 3: Cross multiply
    20,350.90x = 30,535.13 × 10,989.05
  4. Step 4: Simplify right side
    20,350.90x = 335,552,015.38
  5. Step 5: Solve for x
    x = 335,552,015.38/20,350.90
  6. Step 6: Final answer
    x = 16,488.32

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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.