Home / 39,780.94-54,898.08-21,876.07

Finding the Fourth Proportional to 39,780.94, 54,898.08 and 21,876.07

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Solution

The fourth proportional to 39,780.94, 54,898.08 and 21,876.07 is: 30,189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.94 : 54,898.08 = 21,876.07 : x
  2. Step 2: Convert to fraction form
    39,780.94/54,898.08 = 21,876.07/x
  3. Step 3: Cross multiply
    39,780.94x = 54,898.08 × 21,876.07
  4. Step 4: Simplify right side
    39,780.94x = 1,200,953,966.46
  5. Step 5: Solve for x
    x = 1,200,953,966.46/39,780.94
  6. Step 6: Final answer
    x = 30,189.18

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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.