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Finding the Fourth Proportional to 18,676.05, 25,802.19 and 15,872.76

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Solution

The fourth proportional to 18,676.05, 25,802.19 and 15,872.76 is: 21,929.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.05 : 25,802.19 = 15,872.76 : x
  2. Step 2: Convert to fraction form
    18,676.05/25,802.19 = 15,872.76/x
  3. Step 3: Cross multiply
    18,676.05x = 25,802.19 × 15,872.76
  4. Step 4: Simplify right side
    18,676.05x = 409,551,969.34
  5. Step 5: Solve for x
    x = 409,551,969.34/18,676.05
  6. Step 6: Final answer
    x = 21,929.26

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Half 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.