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Finding the Fourth Proportional to 8,916.44, 12,301.86 and 5,189.72

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Solution

The fourth proportional to 8,916.44, 12,301.86 and 5,189.72 is: 7,160.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.44 : 12,301.86 = 5,189.72 : x
  2. Step 2: Convert to fraction form
    8,916.44/12,301.86 = 5,189.72/x
  3. Step 3: Cross multiply
    8,916.44x = 12,301.86 × 5,189.72
  4. Step 4: Simplify right side
    8,916.44x = 63,843,208.88
  5. Step 5: Solve for x
    x = 63,843,208.88/8,916.44
  6. Step 6: Final answer
    x = 7,160.17

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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.