Home / 20,111.10-30,166.65-13,112.70

Finding the Fourth Proportional to 20,111.10, 30,166.65 and 13,112.70

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Solution

The fourth proportional to 20,111.10, 30,166.65 and 13,112.70 is: 19,669.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.10 : 30,166.65 = 13,112.70 : x
  2. Step 2: Convert to fraction form
    20,111.10/30,166.65 = 13,112.70/x
  3. Step 3: Cross multiply
    20,111.10x = 30,166.65 × 13,112.70
  4. Step 4: Simplify right side
    20,111.10x = 395,566,231.46
  5. Step 5: Solve for x
    x = 395,566,231.46/20,111.10
  6. Step 6: Final answer
    x = 19,669.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.