Home / 9,128.13-12,585.39-7,617.86

Finding the Fourth Proportional to 9,128.13, 12,585.39 and 7,617.86

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Solution

The fourth proportional to 9,128.13, 12,585.39 and 7,617.86 is: 10,503.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,128.13 : 12,585.39 = 7,617.86 : x
  2. Step 2: Convert to fraction form
    9,128.13/12,585.39 = 7,617.86/x
  3. Step 3: Cross multiply
    9,128.13x = 12,585.39 × 7,617.86
  4. Step 4: Simplify right side
    9,128.13x = 95,873,739.07
  5. Step 5: Solve for x
    x = 95,873,739.07/9,128.13
  6. Step 6: Final answer
    x = 10,503.11

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Half scale
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Double scale
Find fourth proportional to 9,129.13, 12,586.77 and 7,618.86
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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.