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Finding the Fourth Proportional to 40,752.69, 61,137.84 and 12,672.21

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Solution

The fourth proportional to 40,752.69, 61,137.84 and 12,672.21 is: 19,011.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,752.69 : 61,137.84 = 12,672.21 : x
  2. Step 2: Convert to fraction form
    40,752.69/61,137.84 = 12,672.21/x
  3. Step 3: Cross multiply
    40,752.69x = 61,137.84 × 12,672.21
  4. Step 4: Simplify right side
    40,752.69x = 774,751,547.43
  5. Step 5: Solve for x
    x = 774,751,547.43/40,752.69
  6. Step 6: Final answer
    x = 19,011.05

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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.