Home / 13,779.38-19,015.78-7,810.92

Finding the Fourth Proportional to 13,779.38, 19,015.78 and 7,810.92

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Solution

The fourth proportional to 13,779.38, 19,015.78 and 7,810.92 is: 10,779.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.38 : 19,015.78 = 7,810.92 : x
  2. Step 2: Convert to fraction form
    13,779.38/19,015.78 = 7,810.92/x
  3. Step 3: Cross multiply
    13,779.38x = 19,015.78 × 7,810.92
  4. Step 4: Simplify right side
    13,779.38x = 148,530,736.32
  5. Step 5: Solve for x
    x = 148,530,736.32/13,779.38
  6. Step 6: Final answer
    x = 10,779.20

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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.