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Finding the Fourth Proportional to 40,649.69, 60,980.40 and 12,572.06

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Solution

The fourth proportional to 40,649.69, 60,980.40 and 12,572.06 is: 18,859.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,649.69 : 60,980.40 = 12,572.06 : x
  2. Step 2: Convert to fraction form
    40,649.69/60,980.40 = 12,572.06/x
  3. Step 3: Cross multiply
    40,649.69x = 60,980.40 × 12,572.06
  4. Step 4: Simplify right side
    40,649.69x = 766,648,942.72
  5. Step 5: Solve for x
    x = 766,648,942.72/40,649.69
  6. Step 6: Final answer
    x = 18,859.90

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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.