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Finding the Fourth Proportional to 9,318.60, 13,953.60 and 7,358.40

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Solution

The fourth proportional to 9,318.60, 13,953.60 and 7,358.40 is: 11,018.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.60 : 13,953.60 = 7,358.40 : x
  2. Step 2: Convert to fraction form
    9,318.60/13,953.60 = 7,358.40/x
  3. Step 3: Cross multiply
    9,318.60x = 13,953.60 × 7,358.40
  4. Step 4: Simplify right side
    9,318.60x = 102,676,170.24
  5. Step 5: Solve for x
    x = 102,676,170.24/9,318.60
  6. Step 6: Final answer
    x = 11,018.41

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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.