Home / 30,974.97-42,780.59-20,886.01

Finding the Fourth Proportional to 30,974.97, 42,780.59 and 20,886.01

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Solution

The fourth proportional to 30,974.97, 42,780.59 and 20,886.01 is: 28,846.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,974.97 : 42,780.59 = 20,886.01 : x
  2. Step 2: Convert to fraction form
    30,974.97/42,780.59 = 20,886.01/x
  3. Step 3: Cross multiply
    30,974.97x = 42,780.59 × 20,886.01
  4. Step 4: Simplify right side
    30,974.97x = 893,515,830.55
  5. Step 5: Solve for x
    x = 893,515,830.55/30,974.97
  6. Step 6: Final answer
    x = 28,846.38

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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.