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Finding the Fourth Proportional to 8,445.72, 11,655 and 4,669.14

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Solution

The fourth proportional to 8,445.72, 11,655 and 4,669.14 is: 6,443.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,445.72 : 11,655 = 4,669.14 : x
  2. Step 2: Convert to fraction form
    8,445.72/11,655 = 4,669.14/x
  3. Step 3: Cross multiply
    8,445.72x = 11,655 × 4,669.14
  4. Step 4: Simplify right side
    8,445.72x = 54,418,826.70
  5. Step 5: Solve for x
    x = 54,418,826.70/8,445.72
  6. Step 6: Final answer
    x = 6,443.36

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Half scale
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Double scale
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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.