Home / 7,518.80-11,278.20-3,136.40

Finding the Fourth Proportional to 7,518.80, 11,278.20 and 3,136.40

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Solution

The fourth proportional to 7,518.80, 11,278.20 and 3,136.40 is: 4,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,518.80 : 11,278.20 = 3,136.40 : x
  2. Step 2: Convert to fraction form
    7,518.80/11,278.20 = 3,136.40/x
  3. Step 3: Cross multiply
    7,518.80x = 11,278.20 × 3,136.40
  4. Step 4: Simplify right side
    7,518.80x = 35,372,946.48
  5. Step 5: Solve for x
    x = 35,372,946.48/7,518.80
  6. Step 6: Final answer
    x = 4,704.60

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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.