Home / 12,152.40-16,769.75-8,172.87

Finding the Fourth Proportional to 12,152.40, 16,769.75 and 8,172.87

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Solution

The fourth proportional to 12,152.40, 16,769.75 and 8,172.87 is: 11,278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,152.40 : 16,769.75 = 8,172.87 : x
  2. Step 2: Convert to fraction form
    12,152.40/16,769.75 = 8,172.87/x
  3. Step 3: Cross multiply
    12,152.40x = 16,769.75 × 8,172.87
  4. Step 4: Simplify right side
    12,152.40x = 137,056,945.82
  5. Step 5: Solve for x
    x = 137,056,945.82/12,152.40
  6. Step 6: Final answer
    x = 11,278.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.