Home / 39,780.68-54,896.28-21,877.52

Finding the Fourth Proportional to 39,780.68, 54,896.28 and 21,877.52

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Solution

The fourth proportional to 39,780.68, 54,896.28 and 21,877.52 is: 30,190.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.68 : 54,896.28 = 21,877.52 : x
  2. Step 2: Convert to fraction form
    39,780.68/54,896.28 = 21,877.52/x
  3. Step 3: Cross multiply
    39,780.68x = 54,896.28 × 21,877.52
  4. Step 4: Simplify right side
    39,780.68x = 1,200,994,463.63
  5. Step 5: Solve for x
    x = 1,200,994,463.63/39,780.68
  6. Step 6: Final answer
    x = 30,190.40

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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.