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Finding the Fourth Proportional to 28,150.40, 42,225.60 and 10,620.80

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Solution

The fourth proportional to 28,150.40, 42,225.60 and 10,620.80 is: 15,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,150.40 : 42,225.60 = 10,620.80 : x
  2. Step 2: Convert to fraction form
    28,150.40/42,225.60 = 10,620.80/x
  3. Step 3: Cross multiply
    28,150.40x = 42,225.60 × 10,620.80
  4. Step 4: Simplify right side
    28,150.40x = 448,469,652.48
  5. Step 5: Solve for x
    x = 448,469,652.48/28,150.40
  6. Step 6: Final answer
    x = 15,931.20

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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.