Home / 20,133.80-30,211.54-11,830.02

Finding the Fourth Proportional to 20,133.80, 30,211.54 and 11,830.02

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Solution

The fourth proportional to 20,133.80, 30,211.54 and 11,830.02 is: 17,751.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,133.80 : 30,211.54 = 11,830.02 : x
  2. Step 2: Convert to fraction form
    20,133.80/30,211.54 = 11,830.02/x
  3. Step 3: Cross multiply
    20,133.80x = 30,211.54 × 11,830.02
  4. Step 4: Simplify right side
    20,133.80x = 357,403,122.43
  5. Step 5: Solve for x
    x = 357,403,122.43/20,133.80
  6. Step 6: Final answer
    x = 17,751.40

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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.