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Finding the Fourth Proportional to 12,903.69, 17,790.39 and 8,358.30

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Solution

The fourth proportional to 12,903.69, 17,790.39 and 8,358.30 is: 11,523.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.69 : 17,790.39 = 8,358.30 : x
  2. Step 2: Convert to fraction form
    12,903.69/17,790.39 = 8,358.30/x
  3. Step 3: Cross multiply
    12,903.69x = 17,790.39 × 8,358.30
  4. Step 4: Simplify right side
    12,903.69x = 148,697,416.74
  5. Step 5: Solve for x
    x = 148,697,416.74/12,903.69
  6. Step 6: Final answer
    x = 11,523.64

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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.