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Finding the Fourth Proportional to 28,487.34, 42,725.97 and 7,712.46

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Solution

The fourth proportional to 28,487.34, 42,725.97 and 7,712.46 is: 11,567.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.34 : 42,725.97 = 7,712.46 : x
  2. Step 2: Convert to fraction form
    28,487.34/42,725.97 = 7,712.46/x
  3. Step 3: Cross multiply
    28,487.34x = 42,725.97 × 7,712.46
  4. Step 4: Simplify right side
    28,487.34x = 329,522,334.59
  5. Step 5: Solve for x
    x = 329,522,334.59/28,487.34
  6. Step 6: Final answer
    x = 11,567.33

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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.