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Finding the Fourth Proportional to 11,358.21, 15,672 and 6,641.58

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Solution

The fourth proportional to 11,358.21, 15,672 and 6,641.58 is: 9,164.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,358.21 : 15,672 = 6,641.58 : x
  2. Step 2: Convert to fraction form
    11,358.21/15,672 = 6,641.58/x
  3. Step 3: Cross multiply
    11,358.21x = 15,672 × 6,641.58
  4. Step 4: Simplify right side
    11,358.21x = 104,086,841.76
  5. Step 5: Solve for x
    x = 104,086,841.76/11,358.21
  6. Step 6: Final answer
    x = 9,164.02

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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.