Home / 39,780.16-54,897.97-21,875.92

Finding the Fourth Proportional to 39,780.16, 54,897.97 and 21,875.92

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Solution

The fourth proportional to 39,780.16, 54,897.97 and 21,875.92 is: 30,189.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.16 : 54,897.97 = 21,875.92 : x
  2. Step 2: Convert to fraction form
    39,780.16/54,897.97 = 21,875.92/x
  3. Step 3: Cross multiply
    39,780.16x = 54,897.97 × 21,875.92
  4. Step 4: Simplify right side
    39,780.16x = 1,200,943,599.88
  5. Step 5: Solve for x
    x = 1,200,943,599.88/39,780.16
  6. Step 6: Final answer
    x = 30,189.51

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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.