Home / 30,415.20-42,001.82-28,758.52

Finding the Fourth Proportional to 30,415.20, 42,001.82 and 28,758.52

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Solution

The fourth proportional to 30,415.20, 42,001.82 and 28,758.52 is: 39,714.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,415.20 : 42,001.82 = 28,758.52 : x
  2. Step 2: Convert to fraction form
    30,415.20/42,001.82 = 28,758.52/x
  3. Step 3: Cross multiply
    30,415.20x = 42,001.82 × 28,758.52
  4. Step 4: Simplify right side
    30,415.20x = 1,207,910,180.51
  5. Step 5: Solve for x
    x = 1,207,910,180.51/30,415.20
  6. Step 6: Final answer
    x = 39,714.03

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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.