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Finding the Fourth Proportional to 15,199.67, 20,972.98 and 8,485.04

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Solution

The fourth proportional to 15,199.67, 20,972.98 and 8,485.04 is: 11,707.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,199.67 : 20,972.98 = 8,485.04 : x
  2. Step 2: Convert to fraction form
    15,199.67/20,972.98 = 8,485.04/x
  3. Step 3: Cross multiply
    15,199.67x = 20,972.98 × 8,485.04
  4. Step 4: Simplify right side
    15,199.67x = 177,956,574.22
  5. Step 5: Solve for x
    x = 177,956,574.22/15,199.67
  6. Step 6: Final answer
    x = 11,707.92

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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.