Home / 39,780.34-54,894.99-21,876.10

Finding the Fourth Proportional to 39,780.34, 54,894.99 and 21,876.10

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Solution

The fourth proportional to 39,780.34, 54,894.99 and 21,876.10 is: 30,187.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.34 : 54,894.99 = 21,876.10 : x
  2. Step 2: Convert to fraction form
    39,780.34/54,894.99 = 21,876.10/x
  3. Step 3: Cross multiply
    39,780.34x = 54,894.99 × 21,876.10
  4. Step 4: Simplify right side
    39,780.34x = 1,200,888,290.74
  5. Step 5: Solve for x
    x = 1,200,888,290.74/39,780.34
  6. Step 6: Final answer
    x = 30,187.98

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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.