Home / 20,130.86-30,181.70-10,141.76

Finding the Fourth Proportional to 20,130.86, 30,181.70 and 10,141.76

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Solution

The fourth proportional to 20,130.86, 30,181.70 and 10,141.76 is: 15,205.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.86 : 30,181.70 = 10,141.76 : x
  2. Step 2: Convert to fraction form
    20,130.86/30,181.70 = 10,141.76/x
  3. Step 3: Cross multiply
    20,130.86x = 30,181.70 × 10,141.76
  4. Step 4: Simplify right side
    20,130.86x = 306,095,557.79
  5. Step 5: Solve for x
    x = 306,095,557.79/20,130.86
  6. Step 6: Final answer
    x = 15,205.29

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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.