Home / 21,720.58-32,580.30-6,930.40

Finding the Fourth Proportional to 21,720.58, 32,580.30 and 6,930.40

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Solution

The fourth proportional to 21,720.58, 32,580.30 and 6,930.40 is: 10,395.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.58 : 32,580.30 = 6,930.40 : x
  2. Step 2: Convert to fraction form
    21,720.58/32,580.30 = 6,930.40/x
  3. Step 3: Cross multiply
    21,720.58x = 32,580.30 × 6,930.40
  4. Step 4: Simplify right side
    21,720.58x = 225,794,511.12
  5. Step 5: Solve for x
    x = 225,794,511.12/21,720.58
  6. Step 6: Final answer
    x = 10,395.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.