Home / 8,445.24-12,609.36-7,920.36

Finding the Fourth Proportional to 8,445.24, 12,609.36 and 7,920.36

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Solution

The fourth proportional to 8,445.24, 12,609.36 and 7,920.36 is: 11,825.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,445.24 : 12,609.36 = 7,920.36 : x
  2. Step 2: Convert to fraction form
    8,445.24/12,609.36 = 7,920.36/x
  3. Step 3: Cross multiply
    8,445.24x = 12,609.36 × 7,920.36
  4. Step 4: Simplify right side
    8,445.24x = 99,870,670.57
  5. Step 5: Solve for x
    x = 99,870,670.57/8,445.24
  6. Step 6: Final answer
    x = 11,825.68

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Half scale
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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 (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.