Home / 30,407.50-41,959.40-20,855.58

Finding the Fourth Proportional to 30,407.50, 41,959.40 and 20,855.58

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Solution

The fourth proportional to 30,407.50, 41,959.40 and 20,855.58 is: 28,778.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,407.50 : 41,959.40 = 20,855.58 : x
  2. Step 2: Convert to fraction form
    30,407.50/41,959.40 = 20,855.58/x
  3. Step 3: Cross multiply
    30,407.50x = 41,959.40 × 20,855.58
  4. Step 4: Simplify right side
    30,407.50x = 875,087,623.45
  5. Step 5: Solve for x
    x = 875,087,623.45/30,407.50
  6. Step 6: Final answer
    x = 28,778.68

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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.