Home / 15,720.93-21,694.77-8,647.20

Finding the Fourth Proportional to 15,720.93, 21,694.77 and 8,647.20

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Solution

The fourth proportional to 15,720.93, 21,694.77 and 8,647.20 is: 11,933.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.93 : 21,694.77 = 8,647.20 : x
  2. Step 2: Convert to fraction form
    15,720.93/21,694.77 = 8,647.20/x
  3. Step 3: Cross multiply
    15,720.93x = 21,694.77 × 8,647.20
  4. Step 4: Simplify right side
    15,720.93x = 187,599,015.14
  5. Step 5: Solve for x
    x = 187,599,015.14/15,720.93
  6. Step 6: Final answer
    x = 11,933.07

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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.