Home / 6,315.20-8,715.60-4,719.08

Finding the Fourth Proportional to 6,315.20, 8,715.60 and 4,719.08

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Solution

The fourth proportional to 6,315.20, 8,715.60 and 4,719.08 is: 6,512.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,315.20 : 8,715.60 = 4,719.08 : x
  2. Step 2: Convert to fraction form
    6,315.20/8,715.60 = 4,719.08/x
  3. Step 3: Cross multiply
    6,315.20x = 8,715.60 × 4,719.08
  4. Step 4: Simplify right side
    6,315.20x = 41,129,613.65
  5. Step 5: Solve for x
    x = 41,129,613.65/6,315.20
  6. Step 6: Final answer
    x = 6,512.80

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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.