Home / 19,938.53-29,907.84-18,720.65

Finding the Fourth Proportional to 19,938.53, 29,907.84 and 18,720.65

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Solution

The fourth proportional to 19,938.53, 29,907.84 and 18,720.65 is: 28,081.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,938.53 : 29,907.84 = 18,720.65 : x
  2. Step 2: Convert to fraction form
    19,938.53/29,907.84 = 18,720.65/x
  3. Step 3: Cross multiply
    19,938.53x = 29,907.84 × 18,720.65
  4. Step 4: Simplify right side
    19,938.53x = 559,894,055.36
  5. Step 5: Solve for x
    x = 559,894,055.36/19,938.53
  6. Step 6: Final answer
    x = 28,081.02

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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.