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Finding the Fourth Proportional to 20,259, 27,960.66 and 11,875.50

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Solution

The fourth proportional to 20,259, 27,960.66 and 11,875.50 is: 16,390.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,259 : 27,960.66 = 11,875.50 : x
  2. Step 2: Convert to fraction form
    20,259/27,960.66 = 11,875.50/x
  3. Step 3: Cross multiply
    20,259x = 27,960.66 × 11,875.50
  4. Step 4: Simplify right side
    20,259x = 332,046,817.83
  5. Step 5: Solve for x
    x = 332,046,817.83/20,259
  6. Step 6: Final answer
    x = 16,390.09

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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.