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Finding the Fourth Proportional to 12,172.68, 18,259.20 and 5,247

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Solution

The fourth proportional to 12,172.68, 18,259.20 and 5,247 is: 7,870.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.68 : 18,259.20 = 5,247 : x
  2. Step 2: Convert to fraction form
    12,172.68/18,259.20 = 5,247/x
  3. Step 3: Cross multiply
    12,172.68x = 18,259.20 × 5,247
  4. Step 4: Simplify right side
    12,172.68x = 95,806,022.40
  5. Step 5: Solve for x
    x = 95,806,022.40/12,172.68
  6. Step 6: Final answer
    x = 7,870.58

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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.