Home / 51,987.98-77,981.96-20,412.92

Finding the Fourth Proportional to 51,987.98, 77,981.96 and 20,412.92

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Solution

The fourth proportional to 51,987.98, 77,981.96 and 20,412.92 is: 30,619.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,987.98 : 77,981.96 = 20,412.92 : x
  2. Step 2: Convert to fraction form
    51,987.98/77,981.96 = 20,412.92/x
  3. Step 3: Cross multiply
    51,987.98x = 77,981.96 × 20,412.92
  4. Step 4: Simplify right side
    51,987.98x = 1,591,839,756.91
  5. Step 5: Solve for x
    x = 1,591,839,756.91/51,987.98
  6. Step 6: Final answer
    x = 30,619.38

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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.