Home / 20,510.40-30,765.60-16,816.80

Finding the Fourth Proportional to 20,510.40, 30,765.60 and 16,816.80

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Solution

The fourth proportional to 20,510.40, 30,765.60 and 16,816.80 is: 25,225.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.40 : 30,765.60 = 16,816.80 : x
  2. Step 2: Convert to fraction form
    20,510.40/30,765.60 = 16,816.80/x
  3. Step 3: Cross multiply
    20,510.40x = 30,765.60 × 16,816.80
  4. Step 4: Simplify right side
    20,510.40x = 517,378,942.08
  5. Step 5: Solve for x
    x = 517,378,942.08/20,510.40
  6. Step 6: Final answer
    x = 25,225.20

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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.