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Finding the Fourth Proportional to 12,125.70, 18,152.10 and 10,667.70

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Solution

The fourth proportional to 12,125.70, 18,152.10 and 10,667.70 is: 15,969.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.70 : 18,152.10 = 10,667.70 : x
  2. Step 2: Convert to fraction form
    12,125.70/18,152.10 = 10,667.70/x
  3. Step 3: Cross multiply
    12,125.70x = 18,152.10 × 10,667.70
  4. Step 4: Simplify right side
    12,125.70x = 193,641,157.17
  5. Step 5: Solve for x
    x = 193,641,157.17/12,125.70
  6. Step 6: Final answer
    x = 15,969.48

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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.