Home / 7,784.68-10,742.88-4,640.80

Finding the Fourth Proportional to 7,784.68, 10,742.88 and 4,640.80

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Solution

The fourth proportional to 7,784.68, 10,742.88 and 4,640.80 is: 6,404.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,784.68 : 10,742.88 = 4,640.80 : x
  2. Step 2: Convert to fraction form
    7,784.68/10,742.88 = 4,640.80/x
  3. Step 3: Cross multiply
    7,784.68x = 10,742.88 × 4,640.80
  4. Step 4: Simplify right side
    7,784.68x = 49,855,557.50
  5. Step 5: Solve for x
    x = 49,855,557.50/7,784.68
  6. Step 6: Final answer
    x = 6,404.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.