Home / 54,985.72-82,478.60-19,913.80

Finding the Fourth Proportional to 54,985.72, 82,478.60 and 19,913.80

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Solution

The fourth proportional to 54,985.72, 82,478.60 and 19,913.80 is: 29,870.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,985.72 : 82,478.60 = 19,913.80 : x
  2. Step 2: Convert to fraction form
    54,985.72/82,478.60 = 19,913.80/x
  3. Step 3: Cross multiply
    54,985.72x = 82,478.60 × 19,913.80
  4. Step 4: Simplify right side
    54,985.72x = 1,642,462,344.68
  5. Step 5: Solve for x
    x = 1,642,462,344.68/54,985.72
  6. Step 6: Final answer
    x = 29,870.71

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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.