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Finding the Fourth Proportional to 13,779.87, 18,998.10 and 9,948.27

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Solution

The fourth proportional to 13,779.87, 18,998.10 and 9,948.27 is: 13,715.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.87 : 18,998.10 = 9,948.27 : x
  2. Step 2: Convert to fraction form
    13,779.87/18,998.10 = 9,948.27/x
  3. Step 3: Cross multiply
    13,779.87x = 18,998.10 × 9,948.27
  4. Step 4: Simplify right side
    13,779.87x = 188,998,228.29
  5. Step 5: Solve for x
    x = 188,998,228.29/13,779.87
  6. Step 6: Final answer
    x = 13,715.54

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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.