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Finding the Fourth Proportional to 42,556.68, 63,832.68 and 12,972.03

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Solution

The fourth proportional to 42,556.68, 63,832.68 and 12,972.03 is: 19,457.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,556.68 : 63,832.68 = 12,972.03 : x
  2. Step 2: Convert to fraction form
    42,556.68/63,832.68 = 12,972.03/x
  3. Step 3: Cross multiply
    42,556.68x = 63,832.68 × 12,972.03
  4. Step 4: Simplify right side
    42,556.68x = 828,039,439.94
  5. Step 5: Solve for x
    x = 828,039,439.94/42,556.68
  6. Step 6: Final answer
    x = 19,457.33

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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.