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Finding the Fourth Proportional to 28,499.94, 42,750.64 and 13,503.54

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Solution

The fourth proportional to 28,499.94, 42,750.64 and 13,503.54 is: 20,255.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.94 : 42,750.64 = 13,503.54 : x
  2. Step 2: Convert to fraction form
    28,499.94/42,750.64 = 13,503.54/x
  3. Step 3: Cross multiply
    28,499.94x = 42,750.64 × 13,503.54
  4. Step 4: Simplify right side
    28,499.94x = 577,284,729.75
  5. Step 5: Solve for x
    x = 577,284,729.75/28,499.94
  6. Step 6: Final answer
    x = 20,255.65

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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.