Home / 39,780.62-54,897.65-21,875.75

Finding the Fourth Proportional to 39,780.62, 54,897.65 and 21,875.75

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Solution

The fourth proportional to 39,780.62, 54,897.65 and 21,875.75 is: 30,188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.62 : 54,897.65 = 21,875.75 : x
  2. Step 2: Convert to fraction form
    39,780.62/54,897.65 = 21,875.75/x
  3. Step 3: Cross multiply
    39,780.62x = 54,897.65 × 21,875.75
  4. Step 4: Simplify right side
    39,780.62x = 1,200,926,883.12
  5. Step 5: Solve for x
    x = 1,200,926,883.12/39,780.62
  6. Step 6: Final answer
    x = 30,188.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.