Home / 15,720.36-21,694.20-8,646.60

Finding the Fourth Proportional to 15,720.36, 21,694.20 and 8,646.60

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Solution

The fourth proportional to 15,720.36, 21,694.20 and 8,646.60 is: 11,932.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.36 : 21,694.20 = 8,646.60 : x
  2. Step 2: Convert to fraction form
    15,720.36/21,694.20 = 8,646.60/x
  3. Step 3: Cross multiply
    15,720.36x = 21,694.20 × 8,646.60
  4. Step 4: Simplify right side
    15,720.36x = 187,581,069.72
  5. Step 5: Solve for x
    x = 187,581,069.72/15,720.36
  6. Step 6: Final answer
    x = 11,932.36

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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.