Home / 13,779.65-19,015.16-7,810.97

Finding the Fourth Proportional to 13,779.65, 19,015.16 and 7,810.97

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Solution

The fourth proportional to 13,779.65, 19,015.16 and 7,810.97 is: 10,778.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.65 : 19,015.16 = 7,810.97 : x
  2. Step 2: Convert to fraction form
    13,779.65/19,015.16 = 7,810.97/x
  3. Step 3: Cross multiply
    13,779.65x = 19,015.16 × 7,810.97
  4. Step 4: Simplify right side
    13,779.65x = 148,526,710.17
  5. Step 5: Solve for x
    x = 148,526,710.17/13,779.65
  6. Step 6: Final answer
    x = 10,778.70

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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.