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Finding the Fourth Proportional to 9,392.80, 14,089.20 and 7,856.80

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Solution

The fourth proportional to 9,392.80, 14,089.20 and 7,856.80 is: 11,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,392.80 : 14,089.20 = 7,856.80 : x
  2. Step 2: Convert to fraction form
    9,392.80/14,089.20 = 7,856.80/x
  3. Step 3: Cross multiply
    9,392.80x = 14,089.20 × 7,856.80
  4. Step 4: Simplify right side
    9,392.80x = 110,696,026.56
  5. Step 5: Solve for x
    x = 110,696,026.56/9,392.80
  6. Step 6: Final answer
    x = 11,785.20

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Half 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.