Home / 51,388.13-77,061.74-19,780.58

Finding the Fourth Proportional to 51,388.13, 77,061.74 and 19,780.58

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Solution

The fourth proportional to 51,388.13, 77,061.74 and 19,780.58 is: 29,662.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,388.13 : 77,061.74 = 19,780.58 : x
  2. Step 2: Convert to fraction form
    51,388.13/77,061.74 = 19,780.58/x
  3. Step 3: Cross multiply
    51,388.13x = 77,061.74 × 19,780.58
  4. Step 4: Simplify right side
    51,388.13x = 1,524,325,428.80
  5. Step 5: Solve for x
    x = 1,524,325,428.80/51,388.13
  6. Step 6: Final answer
    x = 29,662.99

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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.