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Finding the Fourth Proportional to 28,453.41, 42,701.90 and 12,881.97

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Solution

The fourth proportional to 28,453.41, 42,701.90 and 12,881.97 is: 19,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,453.41 : 42,701.90 = 12,881.97 : x
  2. Step 2: Convert to fraction form
    28,453.41/42,701.90 = 12,881.97/x
  3. Step 3: Cross multiply
    28,453.41x = 42,701.90 × 12,881.97
  4. Step 4: Simplify right side
    28,453.41x = 550,084,530.33
  5. Step 5: Solve for x
    x = 550,084,530.33/28,453.41
  6. Step 6: Final answer
    x = 19,332.82

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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.