Home / 20,146.40-30,219.60-19,125.80

Finding the Fourth Proportional to 20,146.40, 30,219.60 and 19,125.80

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Solution

The fourth proportional to 20,146.40, 30,219.60 and 19,125.80 is: 28,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.40 : 30,219.60 = 19,125.80 : x
  2. Step 2: Convert to fraction form
    20,146.40/30,219.60 = 19,125.80/x
  3. Step 3: Cross multiply
    20,146.40x = 30,219.60 × 19,125.80
  4. Step 4: Simplify right side
    20,146.40x = 577,974,025.68
  5. Step 5: Solve for x
    x = 577,974,025.68/20,146.40
  6. Step 6: Final answer
    x = 28,688.70

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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.