Home / 15,720.77-21,694.60-8,647.04

Finding the Fourth Proportional to 15,720.77, 21,694.60 and 8,647.04

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Solution

The fourth proportional to 15,720.77, 21,694.60 and 8,647.04 is: 11,932.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.77 : 21,694.60 = 8,647.04 : x
  2. Step 2: Convert to fraction form
    15,720.77/21,694.60 = 8,647.04/x
  3. Step 3: Cross multiply
    15,720.77x = 21,694.60 × 8,647.04
  4. Step 4: Simplify right side
    15,720.77x = 187,594,030.75
  5. Step 5: Solve for x
    x = 187,594,030.75/15,720.77
  6. Step 6: Final answer
    x = 11,932.88

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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.