Home / 10,121.20-15,186-4,570.72

Finding the Fourth Proportional to 10,121.20, 15,186 and 4,570.72

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Solution

The fourth proportional to 10,121.20, 15,186 and 4,570.72 is: 6,857.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.20 : 15,186 = 4,570.72 : x
  2. Step 2: Convert to fraction form
    10,121.20/15,186 = 4,570.72/x
  3. Step 3: Cross multiply
    10,121.20x = 15,186 × 4,570.72
  4. Step 4: Simplify right side
    10,121.20x = 69,410,953.92
  5. Step 5: Solve for x
    x = 69,410,953.92/10,121.20
  6. Step 6: Final answer
    x = 6,857.98

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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.