Home / 54,987.12-82,488.80-19,918.60

Finding the Fourth Proportional to 54,987.12, 82,488.80 and 19,918.60

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Solution

The fourth proportional to 54,987.12, 82,488.80 and 19,918.60 is: 29,880.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,987.12 : 82,488.80 = 19,918.60 : x
  2. Step 2: Convert to fraction form
    54,987.12/82,488.80 = 19,918.60/x
  3. Step 3: Cross multiply
    54,987.12x = 82,488.80 × 19,918.60
  4. Step 4: Simplify right side
    54,987.12x = 1,643,061,411.68
  5. Step 5: Solve for x
    x = 1,643,061,411.68/54,987.12
  6. Step 6: Final answer
    x = 29,880.84

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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.