Home / 13,779.05-19,016.57-7,810.07

Finding the Fourth Proportional to 13,779.05, 19,016.57 and 7,810.07

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Solution

The fourth proportional to 13,779.05, 19,016.57 and 7,810.07 is: 10,778.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.05 : 19,016.57 = 7,810.07 : x
  2. Step 2: Convert to fraction form
    13,779.05/19,016.57 = 7,810.07/x
  3. Step 3: Cross multiply
    13,779.05x = 19,016.57 × 7,810.07
  4. Step 4: Simplify right side
    13,779.05x = 148,520,751.35
  5. Step 5: Solve for x
    x = 148,520,751.35/13,779.05
  6. Step 6: Final answer
    x = 10,778.74

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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.