Home / 20,142.40-30,217.65-16,878.10

Finding the Fourth Proportional to 20,142.40, 30,217.65 and 16,878.10

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Solution

The fourth proportional to 20,142.40, 30,217.65 and 16,878.10 is: 25,320.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.40 : 30,217.65 = 16,878.10 : x
  2. Step 2: Convert to fraction form
    20,142.40/30,217.65 = 16,878.10/x
  3. Step 3: Cross multiply
    20,142.40x = 30,217.65 × 16,878.10
  4. Step 4: Simplify right side
    20,142.40x = 510,016,518.47
  5. Step 5: Solve for x
    x = 510,016,518.47/20,142.40
  6. Step 6: Final answer
    x = 25,320.54

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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.