Home / 20,145.90-30,218.85-10,814.70

Finding the Fourth Proportional to 20,145.90, 30,218.85 and 10,814.70

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Solution

The fourth proportional to 20,145.90, 30,218.85 and 10,814.70 is: 16,222.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.90 : 30,218.85 = 10,814.70 : x
  2. Step 2: Convert to fraction form
    20,145.90/30,218.85 = 10,814.70/x
  3. Step 3: Cross multiply
    20,145.90x = 30,218.85 × 10,814.70
  4. Step 4: Simplify right side
    20,145.90x = 326,807,797.10
  5. Step 5: Solve for x
    x = 326,807,797.10/20,145.90
  6. Step 6: Final answer
    x = 16,222.05

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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.