Home / 21,720.72-32,580.40-6,930.52

Finding the Fourth Proportional to 21,720.72, 32,580.40 and 6,930.52

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Solution

The fourth proportional to 21,720.72, 32,580.40 and 6,930.52 is: 10,395.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.72 : 32,580.40 = 6,930.52 : x
  2. Step 2: Convert to fraction form
    21,720.72/32,580.40 = 6,930.52/x
  3. Step 3: Cross multiply
    21,720.72x = 32,580.40 × 6,930.52
  4. Step 4: Simplify right side
    21,720.72x = 225,799,113.81
  5. Step 5: Solve for x
    x = 225,799,113.81/21,720.72
  6. Step 6: Final answer
    x = 10,395.56

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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.