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Finding the Fourth Proportional to 12,842.91, 17,709.21 and 8,358.39

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Solution

The fourth proportional to 12,842.91, 17,709.21 and 8,358.39 is: 11,525.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,842.91 : 17,709.21 = 8,358.39 : x
  2. Step 2: Convert to fraction form
    12,842.91/17,709.21 = 8,358.39/x
  3. Step 3: Cross multiply
    12,842.91x = 17,709.21 × 8,358.39
  4. Step 4: Simplify right side
    12,842.91x = 148,020,483.77
  5. Step 5: Solve for x
    x = 148,020,483.77/12,842.91
  6. Step 6: Final answer
    x = 11,525.46

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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.