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Finding the Fourth Proportional to 18,779.56, 25,916.16 and 10,820.44

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Solution

The fourth proportional to 18,779.56, 25,916.16 and 10,820.44 is: 14,932.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.56 : 25,916.16 = 10,820.44 : x
  2. Step 2: Convert to fraction form
    18,779.56/25,916.16 = 10,820.44/x
  3. Step 3: Cross multiply
    18,779.56x = 25,916.16 × 10,820.44
  4. Step 4: Simplify right side
    18,779.56x = 280,424,254.31
  5. Step 5: Solve for x
    x = 280,424,254.31/18,779.56
  6. Step 6: Final answer
    x = 14,932.42

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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.