Home / 12,209.28-18,314.40-8,075.76

Finding the Fourth Proportional to 12,209.28, 18,314.40 and 8,075.76

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Solution

The fourth proportional to 12,209.28, 18,314.40 and 8,075.76 is: 12,113.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.28 : 18,314.40 = 8,075.76 : x
  2. Step 2: Convert to fraction form
    12,209.28/18,314.40 = 8,075.76/x
  3. Step 3: Cross multiply
    12,209.28x = 18,314.40 × 8,075.76
  4. Step 4: Simplify right side
    12,209.28x = 147,902,698.94
  5. Step 5: Solve for x
    x = 147,902,698.94/12,209.28
  6. Step 6: Final answer
    x = 12,113.96

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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.