Home / 39,780.06-54,896.58-21,876.18

Finding the Fourth Proportional to 39,780.06, 54,896.58 and 21,876.18

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Solution

The fourth proportional to 39,780.06, 54,896.58 and 21,876.18 is: 30,189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.06 : 54,896.58 = 21,876.18 : x
  2. Step 2: Convert to fraction form
    39,780.06/54,896.58 = 21,876.18/x
  3. Step 3: Cross multiply
    39,780.06x = 54,896.58 × 21,876.18
  4. Step 4: Simplify right side
    39,780.06x = 1,200,927,465.46
  5. Step 5: Solve for x
    x = 1,200,927,465.46/39,780.06
  6. Step 6: Final answer
    x = 30,189.18

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1.5x scale

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.