Home / 6,613.60-9,120.72-5,287.36

Finding the Fourth Proportional to 6,613.60, 9,120.72 and 5,287.36

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Solution

The fourth proportional to 6,613.60, 9,120.72 and 5,287.36 is: 7,291.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.60 : 9,120.72 = 5,287.36 : x
  2. Step 2: Convert to fraction form
    6,613.60/9,120.72 = 5,287.36/x
  3. Step 3: Cross multiply
    6,613.60x = 9,120.72 × 5,287.36
  4. Step 4: Simplify right side
    6,613.60x = 48,224,530.10
  5. Step 5: Solve for x
    x = 48,224,530.10/6,613.60
  6. Step 6: Final answer
    x = 7,291.72

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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.