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Finding the Fourth Proportional to 18,973.82, 28,462.12 and 7,287.04

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Solution

The fourth proportional to 18,973.82, 28,462.12 and 7,287.04 is: 10,931.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.82 : 28,462.12 = 7,287.04 : x
  2. Step 2: Convert to fraction form
    18,973.82/28,462.12 = 7,287.04/x
  3. Step 3: Cross multiply
    18,973.82x = 28,462.12 × 7,287.04
  4. Step 4: Simplify right side
    18,973.82x = 207,404,606.92
  5. Step 5: Solve for x
    x = 207,404,606.92/18,973.82
  6. Step 6: Final answer
    x = 10,931.09

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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.