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Finding the Fourth Proportional to 13,358.58, 18,440.76 and 7,982.93

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Solution

The fourth proportional to 13,358.58, 18,440.76 and 7,982.93 is: 11,019.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,358.58 : 18,440.76 = 7,982.93 : x
  2. Step 2: Convert to fraction form
    13,358.58/18,440.76 = 7,982.93/x
  3. Step 3: Cross multiply
    13,358.58x = 18,440.76 × 7,982.93
  4. Step 4: Simplify right side
    13,358.58x = 147,211,204.02
  5. Step 5: Solve for x
    x = 147,211,204.02/13,358.58
  6. Step 6: Final answer
    x = 11,019.97

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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.