Home / 12,511.40-18,776.34-10,075.61

Finding the Fourth Proportional to 12,511.40, 18,776.34 and 10,075.61

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Solution

The fourth proportional to 12,511.40, 18,776.34 and 10,075.61 is: 15,120.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,511.40 : 18,776.34 = 10,075.61 : x
  2. Step 2: Convert to fraction form
    12,511.40/18,776.34 = 10,075.61/x
  3. Step 3: Cross multiply
    12,511.40x = 18,776.34 × 10,075.61
  4. Step 4: Simplify right side
    12,511.40x = 189,183,126.01
  5. Step 5: Solve for x
    x = 189,183,126.01/12,511.40
  6. Step 6: Final answer
    x = 15,120.87

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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.