Home / 9,159.36-13,728.84-8,421.24

Finding the Fourth Proportional to 9,159.36, 13,728.84 and 8,421.24

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Solution

The fourth proportional to 9,159.36, 13,728.84 and 8,421.24 is: 12,622.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.36 : 13,728.84 = 8,421.24 : x
  2. Step 2: Convert to fraction form
    9,159.36/13,728.84 = 8,421.24/x
  3. Step 3: Cross multiply
    9,159.36x = 13,728.84 × 8,421.24
  4. Step 4: Simplify right side
    9,159.36x = 115,613,856.56
  5. Step 5: Solve for x
    x = 115,613,856.56/9,159.36
  6. Step 6: Final answer
    x = 12,622.48

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Double scale
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Similar ratio
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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.