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Finding the Fourth Proportional to 28,451.57, 42,677.36 and 9,731.78

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Solution

The fourth proportional to 28,451.57, 42,677.36 and 9,731.78 is: 14,597.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,451.57 : 42,677.36 = 9,731.78 : x
  2. Step 2: Convert to fraction form
    28,451.57/42,677.36 = 9,731.78/x
  3. Step 3: Cross multiply
    28,451.57x = 42,677.36 × 9,731.78
  4. Step 4: Simplify right side
    28,451.57x = 415,326,629.84
  5. Step 5: Solve for x
    x = 415,326,629.84/28,451.57
  6. Step 6: Final answer
    x = 14,597.67

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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.