Home / 13,779.25-19,015.02-7,812.86

Finding the Fourth Proportional to 13,779.25, 19,015.02 and 7,812.86

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Solution

The fourth proportional to 13,779.25, 19,015.02 and 7,812.86 is: 10,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.25 : 19,015.02 = 7,812.86 : x
  2. Step 2: Convert to fraction form
    13,779.25/19,015.02 = 7,812.86/x
  3. Step 3: Cross multiply
    13,779.25x = 19,015.02 × 7,812.86
  4. Step 4: Simplify right side
    13,779.25x = 148,561,594.08
  5. Step 5: Solve for x
    x = 148,561,594.08/13,779.25
  6. Step 6: Final answer
    x = 10,781.55

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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.