Home / 15,781.94-21,779.07-10,116.69

Finding the Fourth Proportional to 15,781.94, 21,779.07 and 10,116.69

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Solution

The fourth proportional to 15,781.94, 21,779.07 and 10,116.69 is: 13,961.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.94 : 21,779.07 = 10,116.69 : x
  2. Step 2: Convert to fraction form
    15,781.94/21,779.07 = 10,116.69/x
  3. Step 3: Cross multiply
    15,781.94x = 21,779.07 × 10,116.69
  4. Step 4: Simplify right side
    15,781.94x = 220,331,940.20
  5. Step 5: Solve for x
    x = 220,331,940.20/15,781.94
  6. Step 6: Final answer
    x = 13,961.02

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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.